In the following figure, if the length of the longest side of the following triangle is 36, what is the perimeter of the triangle?

In the following figure, if the length of the longest side of the following triangle is 36, what is the perimeter of the triangle?

A 51

B 63

C 81

D 108

Solution

Correct Answer: Option C

12k =36

k = 3

perimeter = 9k+6k+12k = 27k = 27×3=81