Answer:
The answer to your question is the letter B
Explanation:
Process
To prove if three lengths form a right triangle they must agree with the Pythagorean theorem.
c² = a² + b²
c must be the longest side.
a)
7² = 5² + 6²
49 = 25 + 36
49 ≠ 61 These sides do not form a right triangle
b) 10² = 8² + 6²
100 = 64 + 36
100 = 100 These sides form a right triangle
c) 18² = 9² + 9²
324 = 81 + 81
324 ≠ 162 These sides do not form a right triangle