Right Triangle Solution: Find Side X Using 8 and 17 Units

Question

What is the length of the side marked X?

00:00 Find the length of side X

00:03 The triangle is right-angled, therefore we'll use the Pythagorean theorem

00:09 The sum of squares of the legs equals the square of the hypotenuse

00:12 We'll substitute the appropriate values according to the given data and solve for X

00:15 We'll isolate X

00:31 We'll take the square root

00:37 And this is the solution to the question

We use the Pythagorean theorem:

$AB^2+BC^2=AC^2$

$15$