Question

Which of the following sets of sides does not form a right triangle?

6, 8, 10
8, 15, 17
7, 24, 26
5, 12, 13

Answer 1

From Pythagorean theorem:

a)

$6^2+8^2=36+64=\boxed{100}\\\\10^2=\boxed{100}$

Right triangle.

b)

$8^2+15^2=64+225=\boxed{289}\\\\17^2=\boxed{289}$

Right triangle.

c)

$7^2+24^2=49+576=\boxed{625}\\\\26^2=\boxed{676}$

Not a right tiangle.

d)

$5^2+12^2=25+144=\boxed{169}\\\\13^2=\boxed{169}$

Right triangle and correct answer is C - 7, 24, 26.

Answer 2

The answer is C, I think so