30 points easy question Find the value of x in the isosceles triangle shown below. X=18 X=10 X=9 X=square root 369

Question

asked Nov 18, 2021 71.0k views

2 Answers

Quinn Wei · Answer 1 · 2021-11-24T13:57:58+0000

Answer:

18

Explanation:

The altitude = 12

Half of base = x/2

By pythagoras theorem:

(x/2)² = 15² - 12²

x²/4 = 225 - 144

x²/4 = 81

x² = 324

x = 18