Question

What is the side length a in the triangle below?

The image is of a right triangle with base as 12, altitude a and hypotenuse 13.

Answer 1

a=5

Explanation:

a^2+b^2=c^2

c^2-b^2=a^2

13^2-12^2=a^2

169-144=a^2

25=a^2

5=a