Question

What is the length of the unknown leg in the right triangle?

a.
`√(5)`
b. 5m
c.
`√(45)`
d. 15m

Answer 1

b^2 = 25^2 -29^2 ( by Pythagoras)

b^2 = (25+20)(25-20)

b^2 = 225

b = √225 = 15 m answer

Answer 2

Using the Pythagorean theorem:

25^2 = 20^2 + b^2

625 = 400 + b^2

b^2 = 625 - 400

b^2 = 225

b = 15

The answer is d. 15m