Find the average of the two endpoints to find their midpoint. To find the average of two numbers, add them together and divide by two.

\(\displaystyle \frac{-3 + 7}{2} = \frac{4}{2} = 2\)

A line of symmetry is the imaginary line that you draw through a shape so that you can fold the image over the line and have both halves match exactly. Any regular shape has as many lines of symmetry as it does sides. Since a square has four sides, the correct answer is 4!

A line of symmetry divides a shape into two equal and identical halves. Any regular shape has as many lines of symmetry as it does sides. Since octagons have eight sides, the correct answer is 8.

A line of symmetry is the imaginary line that you draw through a shape so that you can fold the image over the line and have both halves match exactly. Any regular shape has as many lines of symmetry as it does total sides. Since a rectangle has four sides, the correct answer is 4!

Divide the length of the line by 2 to find the length of each half:

\(\displaystyle 46\div 2=23\ inches\)

A line of symmetry is the imaginary line that you draw through a shape so that you can fold the image over the line and have both halves match exactly. Any regular shape has as many lines of symmetry as it does sides. Since an octagon has eight sides, the correct answer is \(\displaystyle 8\).

Ms. Johnson started with \(\displaystyle 5\) feet of yarn, however she only needs half of the \(\displaystyle 5\) feet.

To find the length of the amount of yarn that she needs, divide \(\displaystyle 5\) in half. 

The solution is: 

                        \(\displaystyle \frac{5}{2}=2.5\)

The length of Mr. Thomas' garden is exactly half the distance of the width of the garden.

The width of the garden is \(\displaystyle 32\) feet.

Thus, the length is equal to,

 \(\displaystyle \frac{32}{2}=16\)

Debra is \(\displaystyle 5\tfrac{1}{2}\) feet tall. Celeste is half the height of her mother Debra.

Thus, to find Celeste's height, divide \(\displaystyle 5\tfrac{1}{2}\) in half. 

The solution is:

Step one: convert \(\displaystyle 5\tfrac{1}{2}\) into an improper fraction.

                           \(\displaystyle 5\tfrac{1}{2}=\frac{11}{2}\)


Step two: divide \(\displaystyle \frac{11}{2}\) by \(\displaystyle 2\).

\(\displaystyle \frac{\frac{11}{2}}{2}=\frac{11}{2}\cdot\frac{1}{2}=\frac{11}{4}\)

Step three: express \(\displaystyle \frac{11}{4}\) in feet as a mixed number. 

\(\displaystyle 11\div4=2\tfrac{3}{4}\)

Since the height of the rectangular wall is half the length of the width, divide \(\displaystyle 25\) by \(\displaystyle 2.\) 

The solution is:

\(\displaystyle 25 \div2=12\tfrac{1}{2}\)

Check:

\(\displaystyle 12\times2=24\)
\(\displaystyle 2\times \frac{1}{2}=1\)
\(\displaystyle 24 + 1= 25\)