Find the height of a triangle with area of 81 square centimeters and a base of 9 cm.?

0 ⤊

Find the height of a triangle with area of 81 square centimeters and a base of 9 cm.

9 cm

18 cm

182.25 cm

364.5 cm

2007-08-23 14:18:25 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

the area of a triangle is A = 1/2 (b * h).

A = 1/2 (b * h)
81 = 1/2 (9 * h)
81 = 4.5h
h = 18

The height is 18 cm.

2007-08-23 14:24:16 · answer #1 · answered by Anonymous · 0⤊ 0⤋

Area = 1/2 base * altitude

81 = 4.5 altitude

altitude = 18 cm
.

2007-08-23 14:24:18 · answer #2 · answered by Robert L 7 · 0⤊ 0⤋