Question

Pythagorean theorem - please help

Answer 1

x = 4
`√(2)` or 5.6568

Explanation:

• know the formula and plug in

formula: a^2 + b^2 = c^2

• now plug in what we have
• whatever the RIGHT ANGLE points to is the HYPOTENUSE or c
• the other two sides are the "legs" or a and b

a^2 + b^2 = c^2

7^2 + b^2 = 9^2

49 + b^2 = 81

b^2 = 32

b = 4
`√(2)`

• in this case, b would be used as x

x = 4
`√(2)` or 5.6568 (exact value)