Question

PLEASE I REALLY NEED HELP
Find x. Assume that segments that appear tangent are tangent.
http://media.education2020.com/EVresources/647-11-05-00-00_files/i0020000.jpg

Answer 1

@kristina95 A radius drawn to a tangent at the point of tangency is perpendicular to it. That forms a right angle.

Use the Pythagorean Theorem:

5^2 + x^2 = 13^2

If you know about Pythagorean triples, you can get the answer by inspection. If not, crank out x using the theorem.