Question

If a triangle has side lengths of 14 centimeters and 18 centimeters and the perimeter is 49 centimeters, how long is the third side?

Answer 1

Answer: 17 centimeters

Explanation:

The perimeter of a triangle is all 3 sides added up

x+y+z=p

Substitute 14 in for x, 18 in for y and 49 in for p

14+18+z=49

Add on the left side

32+z=49

Subtract 32 on both sides

z=17

So, the third side is 17 centimeters

Hope this helps! :)