Pairs of similar triangles are shown.Find the missing length of sides.Please help!!!?

Question

there are two right triangles,One is bigger than the other one.On the big triangle the hypotenuse is B,other two cathetis are 12 and A. And on the smaller triangle the hypotenuse is 5 , other two cathetis are 4 and 3. Please help me find the missing sides of the bigger right triangle.Thank you so much!

Answer 1

Sounds like you have

3,   4,   5     right triangle and

A   12   B     right triangle

since 12 is 3 x 4    a should be 3x3 or 9   and b is 3x5 or 15

so 9 , 12, 15