Question

Two sides of a triangle are equal in length. The third side of the triangle is 3 more than the equal sides. If the perimeter of the triangle is 48, what is the length of the longest side?

Show work

Answer 1

18

Explanation:

The two smaller sides are 15 and the larger one is 18

Answer 2

• 18

Explanation:

Let the length of equal sides be x, then the perimeter is:

• 2x + (x + 3) = 48
• 3x + 3 = 48
• 3x = 45
• x = 15

The longest side is:

• 15 + 3 = 18