Question

A triangle has sides with lengths of 15 inches, 15 inches, and 19 inches. Is it a right triangle?

yes
no

Answer 1

No it isn't a right triangle

Answer 2

To check if this triangle is a right triangle, we can use the Pythagorean theorem (shown below).

a^2 + b^2 = c^2

(15)^2 + (15)^2 = (19)^2

225 + 225 = 361

450 = 361 - False

This triangle is NOT a right triangle.

Hope this helps! :)