Please help someone I need an answer

Answer:
Step-by-step explanation:
Right Isosceles Triangle
Side a = 9
Side b = 9
Side c = 12.72792 = 9√2
Angle ∠A = 45° = 0.7854 rad = π/4
Angle ∠B = 45° = 0.7854 rad = π/4
Angle ∠C = 90° = 1.5708 rad = π/2
hope you pass your retest ;)