Understanding Angle Addition Postulate
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Beginner
Start here! Easy to understand
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Beginner Explanation
If point D is in the interior of ∠ABC, then m∠ABD + m∠DBC = m∠ABC.
Practice Problems
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1
Quick Quiz
Single Choice Quiz
Beginner
If $\angle ACB$ is 60° and $\angle BCD$ is 30°, what is the measure of $\angle ACD$?
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2
Real-World Problem
Question Exercise
Intermediate
Ice Cream Cone Scenario
An ice cream cone forms a 60° angle at the tip. A scoop of ice cream divides this into two angles of 30° and 30°. Is this possible? Explain your reasoning.
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3
Thinking Challenge
Thinking Exercise
Intermediate
Think About This
If $\angle ACB$ is 50° and $\angle BCD$ is 70°, what is the measure of $\angle ACD$?
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4
Challenge Quiz
Single Choice Quiz
Advanced
If $\angle ACB$ is x and $\angle BCD$ is y, which of the following represents $\angle ACD$?
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