Question

In centimeters, what is the unknown length in this right triangle?

Answer 1

Hey!

You have to use the Pythagorean Theorem.

a² + b² = c² is the same as: c² - b² = a²

$c = 61 \\ 61^{2} = 61 \times 61 = 3,721$

$b = 60 \\ 60^{2} = 60 \times 60 = 3,600$

Subtract:

$3,721 - 3,600 = 121$

√121 = 11

$\framebox{x = 11 cm}$

Answer 2

Using the Pythagorean Theorem:

x^2 = 61^2 - 60^2

x^2 = 3721 - 3600

x^2 = 121

x = SQRT(121)

x = 11 cm.