PTG has side lengths of 18 cm, 27 cm, and 13 cm. which type of triangle is PTG? The answer is obtuse.

I found the answer but if anyone needs it here ya go

To know what kind of triangle is it. use the pythagorean theorem:

A^2 + B^2 = C^2,

where C is the longest side of the triangle

if it satisfies the equation then it is a right triangle

if it does not then A^2 + B^2 > C^2 so it is acute triangle

if A^2 + B^2 < C^2 it is obtuse triangle

18^2 + 13^2? 27^2

324 + 169? 729

493 < 729 so it is obtuse triangle