Question

If mZC = 90°, side c= 29, and side a= 21, then side b=_

Answer 1

b = 20

Explanation:

The triangle is a right triangle, so the Pythagorean theorem applies.

a² + b² = c²

21² + b² = 29² . . . . . . . . . fill in the given values

b² = 841 -441 = 400 . . . . subtract 21²

b = √400 = 20 . . . . . . . . take the square root

Side b is 20 units long.