Question

If the two legs of a right triangle are 15 and 20, how long is the hypotenuse?

Answer 1

A2 + B2 = C2 is the Pythagorean Theorem where A and B are the legs and C is the hypotenuse.

(15cm)2 + (20cm)2 = C2 after substitution

225cm2 + 400cm2 = C2 add

625cm2 = C2 Take square root of both sides

25cm = C which is the hypotenuse.

Answer 2

25

Explanation:

To solve this problem, you can use the pythagorean theorem, which is a^2 + b^2 = c^2 where a and b are legs and c is the hypotenuse. We can plug in the values of 15 and 20, and solve for c:

15^2 + 20^2 = c^2

225 + 400 = c^2

625 = c^2

c = 25

This means the hypotenuse is 25.