Which of the triangles below is not a right triangle?

a.) 3 cm, 4 cm, 5 cm

b.) 6 ft, 8 ft, 12 ft

c.) 27 cm, 36 cm, 45 cm

Step-by-step explanation:

Pythagorean Theorem : In a right triangle, square of hypotenuse is equal to the sum of the squares of the other sides.

Hence these sides represent a right triangle.

Hence this does not represent a right triangle.

This represents a right triangle.

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)