Question

What is the perimeter of a triangle with the side lengths of 2, 5, and 10x?

- 7 + 10x
- 17x
- 17 + x
- 70x

Answer 1

The perimeter of a triangle with length of sides a, b and c:

P = a + b + c

a = 2, b = 5, c = 10x

Substitute:

P = 2 + 5 + 10x = 7 + 10x

Answer: 7 + 10x