Given that the area of a triangle is 36 square centimeters and the height is 18 centimeters, use the formula for the area of a triangle to find the base

The base is 9 cm. Because the formula of area a triangle is 1/2 or half base times height. So if the area is 36, you subtract 18, which is the height. leaving 18 (36 - 18 = 18) Then you dived 18 by 2. Since to find half of a number you dived by 2. Which is 9 (8:2=9)

Formula for area of triangle

= 1/2 x base x height

1/2 x base x 18 = 36

(1/2 x 18 = 9)

9 x base = 36

base = 36 / 9 = 4cm

Answer : 4cm