What is x? 03/25/2021 – by Mod_GuideK 0 A right triangle has two sides, 9 and x, and a hypotenuse of 15. What is x? A. 14 B. 13 C. 11 D. 12 E. 10 SHOW ANSWERSCorrect Answer: D Explanation/Reference: Explanation: We can use the Pythagorean Theorem to solve for x. 92 + x2 = 152 81 + x2 = 225 x2 = 144x = 12 Download Printable PDF. VALID exam to help you PASS.