Given, the triangle is isosceles, so, two sides are equal in length.
Also, given the triangle is a right angled triangle, hence, the two equal sides of the triangle are the legs of the triangle excluding the hypotenuse.
Leg length = 6
Hence,
(Hypotenuse)² = (leg)² + (other leg)² = 6² + 6² = 36 + 36 = 72
Hypotenuse = √(72) = 8.48528137424 ≈ 8.49
