Question

These are two similar triangles.

What is the measure of y?
15
X
3
У.
6
y = [?]

Answer 1

7.5

Explanation:

................................

Answer 2

10

Explanation:

6 / ( 3 + 6 ) = y / 15

6 / 9 = y / 15

2 / 3 = y / 15

3 * y = 15 * 2

y = ( 15 * 2 ) / 3

= 5 * 2

y = 10