Question

Which of the following could not be the lengths of the sides of a right angled triangle?

A. 3, 4, 5
B. 5, 12, 13
C. 8, 15, 17
D. 12, 15, 18
E. 9, 12, 15

Answer 1

12^2 +15^=18^
144+225=324
Add 144 to 225 = 369
369=324
Divide 369 to 324 = 1.13888889
1.13 is your answer
D is a false statement

Answer 2

D. Because of the Pythagorean Theorem that says
a^2+b^2=c^2
12^2+15^2=18^2
144+225=324
369=324
This statement is false, so tees can't be the sides of a right triangle.