Question

Suppose that the area of a triangle is 9 square feet, and the base is 2 times the height. Find the base of the triangle, in feet.

Answer 1

Step-by-step explanation:

baseline = 2×height.

area = baseline × height / 2 = 9 ft².

so, we can use the identity of the first equation and put it into the second equation :

9 = 2×height × height / 2 = height²

height = 3 ft.

baseline = 2×height = 2×3 = 6 ft.