Answer:
x = 5
Step-by-step explanation:
Since the triangle is isosceles, the height is cutting the base in half.
That means the 2 right triangles have sides of 3 and 4.
The 3rd side is x. Using the Pythagorean Theorem, you get 5.
It is a 3-4-5 triple.
The previous response is wrong because it is isosceles, not equilateral
