Question

Segment A'B' iS parallel to segment AB.
What is the length of segment A'A?

Answer 1

answer:18

Explanation:

From the figure, we can see that ABC and A'B'C are similar triangles.

Because Segment A'B' is parallel to segment AB.

then angleA'B'C=ABC CA'B'=CAB A'CB'=ACB

A'B':AB=8:20 rate=0.4

A'C:AC=12:?

12/0.4=AC=30

AC-A’C=30-12=18