Mario T. answered • 12/02/15

Tutor

4.5
(11)
Cornell University Class of 2015 BS in Mechanical Engineering

Use Pythagorean Theorem, a

^{2}+ b^{2}= c^{2}We have a and c

We need to find b

A = 15

c=25

Solve equation for b

b

^{2}= c^{2}- a^{2}= 25^{2}- 15^{2}= 625 - 225 = 400b

^{2}= 400b = 20

The length of b is 20.

You can also recognize that this triangle resembles a 3,4,5 triangle scaled up, so this triangle would be 15,20,25 if you just scale up that triangle by 5.