Question

An isosceles triangle has legs whose lengths are 10 inches and a base whose length is 12 inches. Which of

the following is the area of the triangle in square inches?
(1) 34
(2) 48
(3) 60
(4) 84​

Answer 1

48

Explanation:

We have to find the height of the triangle to find its area. The altitude to the base of an isosceles triangle is also the median, meaning the altitude forms a 6-8-10 right triangle, so the length of the height is 8, and therefore the area is 0.5 * 8 * 12 = 48.