50pt
which triangle is similar to the triangle above?
( explain how you got your answer you)

Y. this one is similar to the above triangle.

proof :-

if we subtract the sum of two angles in triangle Y from 180° we get 88°. which is the third angle of the above triangle.

and sum of 88° + 20° = 108°

by angle sum property, we can find it's another angle..

= 180° - 108°

= 72°

hence, it's proved that both triangles are same.

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x

step-by-step explanation:

why? because i noticed a pattern. 60 120. those numbers without the zero, make the 6 times tables leaving your answer to be b since 6 times 4 is 24 and adding a zero making it 240.