Question

An isosceles triangle has a 5 inch base and 8 inch side. What is the perimeter of the triangle​

Answer 1

21 in.

Explanation:

If the triangle is isosceles, then two of its three sides are of equal length. We can assume that the side lengths are 5 in., 8 in and 8 in. Summing these up, we get total length 21 in. That's the perimeter of the triangle.

Answer 2

21

Explanation:

An isosceles triangle has 2 sides of the same length, those sides being the sides that aren't the base. The perimeter is the total length of all 3 sides of the triangle. We know that the base is 5 inches, and that one side is 8. Because the triangle is isosceles, we know that the others ide is also 8 inches. Therefore, the perimeter is 8+8+5, which is 21.