Question

AABC and AXYZ are similar. Find the missing side length.

B
Y
14
28
A
2
4
А
?
C
X
3
Z
(The triangles are not drawn to scale.)

Answer 1

21

Explanation:

You can tell that AB=2x7

BC=4x7

So, you're increasing each by multiplying each by 7.

3x7=21.