Question

Find the value of x in the isosceles triangle shown below.​

Answer 1

(x/2)²+12² =15²

(x/2)²+144=225

(x/2)²=225-144

x²/4. =81

x² =81×4

x. =√81×4

x. =9×2

x. =18

answer is option A

Answer 2

option A

Explanation:

Let x = y + y

Now using Pythagoras theorem :

`15^2 = y^2 + 12^2\\225 = y^2 + 144\\225 - 144 = y^2\\81 = y^2\\9 = y`

Therefore , x = y + y = 18