Question

The triangle below is a right triangle. What is the length of the missing side? Round your answer to the nearest whole number?

Answer 1

Answer: D

Step-by-step explanation:

We can eliminate 7 and 11 because the length has to be longer than 12 (called hypotenuse, it is the longest side of a triangle). And 225 is kind of ridiculous. We can also use the Pythagorean Theorem which applies to all right angle triangles to figure out the hypotenuse, so 9^2 (81) + 12^2 (144) = x^2. So then, 81 plus 144 is about 225. And the square root of 225 is 15, therefore the answer is 15. Hope this helps!

Answer 2

Answer: C) 15

Step-by-step explanation:

Use the Pythagorean theorem

$x^{2}$= $12^{2}$ + $9^{2}$

$x^{2}$ = $225$

$x = \sqrt{225}$

$x = 15$