Question

Solve for x in the diagram.

Answer 1

12^2-9^2 =63
Square root of 63 is 7.93725...
Answer is 7.94 rounded up

Answer 2

x = 15

Explanation:

Using Pythagorean Theorem

=>
`c^2 = a^2+b^2`

Where c= x, a = 12, b = 9

=>
`x^2 = (12)^2+(9)^2`

=>
`x^2 = 144+81`

=>
`x^2 = 225`

Taking sqrt on both sides

=> x = 15