Answer:
Not right angled
Step-by-step explanation:
According to Pythagoras' identity for right triangles.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides.
Thus if the longest side squared is equal to the sum of the other 2 sides then triangle is right.
AB = 8, BC = 5 and AC = 22 - 8 - 5 = 9
9² = 81
5² + 8² = 25 + 64 = 89 ≠ 81
Thus the triangle is not right
