This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through 40 one-degree angles has a measure of 40°—there is a direct, simple correspondence between the count and the measure. The angle turns through 40 one-degree angles, so students need to recognize this equals 40°, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice B is correct because 40 one-degree angles directly equals 40 degrees. This demonstrates understanding that degree measurement is a counting process—the number of one-degree angles equals the degree measure. Choice C represents subtracting from 360 (360-40=320), which happens when students confuse the counting concept with the circular fraction concept (1° = 1/360 circle). To help students: Use the analogy of measuring length—just as we count inches to measure length, we count one-degree angles to measure angles. Show visual representations with tick marks for each degree. Emphasize that 'n one-degree angles = n degrees' is a direct correspondence (40 one-degree angles = 40°, not 41° or 320°). Practice with simple counts: 10 one-degree angles = 10°, 30 one-degree angles = 30°, 90 one-degree angles = 90°. Connect to previous learning: we know 1° = 1/360 of a circle (the size of each unit), but when we COUNT those units, n of them = n degrees. Watch for: students who subtract from 360 (confusing with full circle), students who add one (off-by-one errors), and students who multiply unnecessarily (like 40×10=400).

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through 45 one-degree angles has a measure of 45°—there is a direct, simple correspondence between the count and the measure. Sofia counted 45 one-degree angles in an angle, so students need to recognize this equals 45°, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice B is correct because 45 one-degree angles directly equals 45 degrees. This demonstrates understanding that degree measurement is a counting process—the number of one-degree angles equals the degree measure. Choice D represents multiplying by 360 (45 × 360 = 16200), which happens when students confuse the counting concept with the circular fraction concept and think there's a calculation needed when it's just counting. To help students: Use the analogy of measuring length—just as we count inches to measure length, we count one-degree angles to measure angles. Show visual representations with tick marks for each degree. Emphasize that 'n one-degree angles = n degrees' is a direct correspondence (45 one-degree angles = 45°, not 45 × 360). Practice with simple counts: 10 one-degree angles = 10°, 30 one-degree angles = 30°, 90 one-degree angles = 90°. Connect to previous learning: we know 1° = 1/360 of a circle (the size of each unit), but when we COUNT those units, n of them = n degrees.

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through 25 one-degree angles has a measure of 25°—there is a direct, simple correspondence between the count and the measure. An angle is composed of 45 one-degree angles, so students need to recognize this equals 45°, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice B is correct because 45 one-degree angles directly equals 45 degrees. Choice A represents adding 360 unnecessarily, which happens when students confuse with full circles. To help students: Show visual representations with tick marks for each degree. Emphasize that no complex calculation is needed—it's simple counting—and practice with examples like 45 one-degree angles = 45°.

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through 25 one-degree angles has a measure of 25°—there is a direct, simple correspondence between the count and the measure. The question asks for the statement that correctly describes angle measure, so students need to recognize that turning through n one-degree angles means a measure of n degrees, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice A is correct because it states that n one-degree angles directly equals n degrees. Choice D represents multiplying by 360, which happens when students confuse the counting concept with the circular fraction concept (1° = 1/360 circle). To help students: Use the analogy of measuring length—just as we count inches to measure length, we count one-degree angles to measure angles. Show visual representations with tick marks for each degree, emphasize that 'n one-degree angles = n degrees' is a direct correspondence, and practice with simple counts like 10 one-degree angles = 10°.

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through 35 one-degree angles has a measure of 35°—there is a direct, simple correspondence between the count and the measure. The angle is built by combining 35 one-degree angles, so students need to recognize this equals 35°, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice B is correct because 35 one-degree angles directly equals 35 degrees. This demonstrates understanding that degree measurement is a counting process—the number of one-degree angles equals the degree measure. Choice A represents adding one extra degree, which happens when students miscount or think they need to include an additional unit. To help students: Use the analogy of measuring length—just as we count inches to measure length, we count one-degree angles to measure angles. Show visual representations with tick marks for each degree. Emphasize that 'n one-degree angles = n degrees' is a direct correspondence (35 one-degree angles = 35°, not 36° or 325°). Practice with simple counts: 10 one-degree angles = 10°, 30 one-degree angles = 30°, 90 one-degree angles = 90°. Connect to previous learning: we know 1° = 1/360 of a circle (the size of each unit), but when we COUNT those units, n of them = n degrees. Watch for: students who add or subtract one (off-by-one errors), students who subtract from 360 (confusing with full circle), and students who omit the degree symbol in their answers.

This question tests 4th grade understanding that an angle which turns through $n$ one-degree angles is said to have an angle measure of $n$ degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through 30 one-degree angles has a measure of $30^\circ$—there is a direct, simple correspondence between the count and the measure. The angle turns through 30 one-degree angles, so students need to recognize this equals $30^\circ$, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice A is correct because 30 one-degree angles directly equals $30$ degrees. This demonstrates understanding that degree measurement is a counting process—the number of one-degree angles equals the degree measure. Choice D represents multiplying by 360 ($30 \times 360 = 10800$), which happens when students confuse the counting concept with the circular fraction concept and think there's a calculation needed when it's just counting. To help students: Use the analogy of measuring length—just as we count inches to measure length, we count one-degree angles to measure angles. Show visual representations with tick marks for each degree. Emphasize that 'n one-degree angles = n degrees' is a direct correspondence (30 one-degree angles = $30^\circ$, not $30 \times 360$). Practice with simple counts: 10 one-degree angles = $10^\circ$, 30 one-degree angles = $30^\circ$, 90 one-degree angles = $90^\circ$. Connect to previous learning: we know $1^\circ = \frac{1}{360}$ of a circle (the size of each unit), but when we COUNT those units, n of them = n degrees.

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that measures 120° contains exactly 120 one-degree angles—there is a direct, simple correspondence between the measure and the count. The angle measures 120°, so students need to understand this means 120 one-degree angles, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice C is correct because an angle measuring 120° contains exactly 120 one-degree angles. This demonstrates understanding that degree measurement is a counting process—the degree measure equals the number of one-degree angles. Choice B represents adding the degree symbol (120°), which happens when students don't understand the question asks for a count (just the number) not a measurement with units. To help students: Use the analogy of measuring length—just as a 120-inch board contains 120 one-inch units, a 120° angle contains 120 one-degree units. Show visual representations with tick marks for each degree. Emphasize that 'n degrees = n one-degree angles' is a direct correspondence (120° = 120 one-degree angles). Practice with simple counts: when asked "how many one-degree angles," the answer is just the number without the degree symbol. Watch for: students who add the degree symbol to counts (the answer is 120, not 120°), students who double the number thinking of supplementary angles (240), and students who think there's a fraction calculation (1/3 represents 120°/360°).

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through 25 one-degree angles has a measure of 25°—there is a direct, simple correspondence between the count and the measure. The angle turns through 50 one-degree angles, so students need to recognize this equals 50°, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice A is correct because 50 one-degree angles directly equals 50 degrees. Choice D represents multiplying by 360, which happens when students confuse the counting concept with the circular fraction concept (1° = 1/360 circle). To help students: Emphasize that 'n one-degree angles = n degrees' is a direct correspondence. Practice with examples like 30 one-degree angles = 30° and connect to knowing 1° = 1/360 of a circle, but counting units means n of them = n degrees.

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through $25^\circ$ has a measure of $25^\circ$—there is a direct, simple correspondence between the count and the measure. The angle measures $40^\circ$, so students need to understand this means 40 one-degree angles, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice A is correct because an angle measuring $40^\circ$ contains exactly 40 one-degree angles. Choice D includes the degree symbol, which happens when students don't understand the question is asking for the count, not the measure with units. To help students: Use the analogy of measuring length—just as we count inches to measure length, we count one-degree angles to measure angles. Show visual representations with tick marks for each degree, emphasize that 'n one-degree angles = n degrees' is a direct correspondence, and practice with simple counts like 10 one-degree angles = $10^\circ$.

This question tests 4th grade understanding that an angle which turns through n one-degree angles is said to have an angle measure of n degrees (CCSS.4.MD.5.b). A degree (°) is the unit of angle measurement, just like an inch is a unit of length. When we measure an angle, we are counting how many one-degree angles fit in that angle. An angle that turns through $25^\circ$ has a measure of $25^\circ$—there is a direct, simple correspondence between the count and the measure. The angle turns through 20 one-degree angles, so students need to recognize this equals $20^\circ$, demonstrating the fundamental understanding that angle measurement is counting one-degree angle units. Choice C is correct because 20 one-degree angles directly equals $20^\circ$. Choice B represents multiplying by 360, which happens when students think a calculation is needed instead of direct counting. To help students: Emphasize direct correspondence with examples like 20 one-degree angles = $20^\circ$. Watch for confusion with circle measurements and practice simple counts.