Lin drew a triangle and dilation of the triangle with scale factor

a. What is the center of the dilation? Explain how you know.

b. Which triangle is the original and which triangle is the dilation? Explain how you know.

Step-by-step explanation:

a. What is the center of the dilation? Explain how you know.

Point A

AE lies along AB

an

AD lies along AC

Both can only be true if A is the center of dilation.

b. Which triangle is the original and which triangle is the dilation? Explain how you know.

ABC is the original and AED is the dilations Because AE is half of AB  and AD is half of AC. The dilation factor is ½

19

step-by-step explanation:

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees