Question

*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

Answer 1

18

Explanation:

Answer 2

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