Answer:
Not a right triangle
Step-by-step explanation:
A right triangle obeys the Pythagorean theorem
a^2 +b^2 = c^2
66^2 + 73^2 = 99^2
4356 + 5329 = 9801
9685 = 9801
This is not true, so the three sides do not obey the Pythagorean theorem.
This means that the this is not a right triangle.
