High School

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

Options:
A. 25 m
B. 20 m
C. \(\sqrt{5}\) m
D. 5 m
E. 145 m
F. 15 m

Answer :

Answer:

The length of the unknown leg is 15m

Step-by-step explanation:

To calculate the unknown leg we need to use Pythagoras

h = hyoptenuse = 25m

a = leg 1 = 20m

b = leg 2

h² = a² + b²

we replace with the known values

(25m)² = (20m)² + b²

625m² = 400m² + b²

625m² - 400m² = b²

225m² = b²

√225m² = b

15m = b

The length of the unknown leg is 15m

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