Question

Pythagorean Theorem I need help ?

Answer 1

b=16

Explanation:

the Pythagorean theorem states that a² + b² = c²

you are looking for b in this case so you need to change the formula a bit

a² + b² = c²

subtract a² to the other side

b²= c²-a²

now plug in the values

b²= 20²-12²

(the hypotenuse= the longest side or 20cm)

solve

b²= 400 - 144

b²= 256

take the square root of both sides

b = 16

check:

400 =144 + 256

400=400

Answer 2

a2 + b2 = c2
Plug in numbers c2= 20^2 , a2= 12^2