Find the length of the missing side of the right triangle.

Question

A right scalene triangle has the following dimensions:
5 yd up 13 yd across. The base is unknown.
A.194 yd
B.13.93 yd
C.144 yd
D.12 yd

Answer 1

Not quite sure what "across" means, but since you mention the base, I'll assume it's the hypotenuse. So,
5^2 + x^2 = 13^2
It will help to know a few basic Pythagorean triples, such as
3-4-5
5-12-13
8-17-15
7-24-25