Question

Which set of numbers represent the lengths of the sides of a right triangle?
A- 9, 10, 11
B- 8, 12, 16
C- 16, 32, 36
D- 3, 4, 5

Answer 1

The basic deal is a^2 + b^2 = c^2
A= incorrect, 81 + 100 does not equal 121.
B= incorrect, 64 + 144 does not equal 256.
C= incorrect, 256 + 1024 does not equal 1280
This leaves D.

D must be a right triangle.