Question

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

5
5
C
6
Choose
answer:
= 761
x = V11
x = 15

Answer 1

D. x=4

Explanation:

We can solve this with the Pythagorean Theorem for the right triangle that we can see (which is half of the triangle).

The bottom length is 3 and the hypotenuse is 5.

The Pythagorean Theorem is a²+b²=c².

We can plug this in:

3²+x²=5²

9+x²=25

x²=16

x=4