A triangle has a base of 9 feet and a height of 12 feet. What is the area of the triangle? A. 42 ft2 B. 54 ft2 C. 84 ft2 D. 108 ft2

For a triangle: A=1/2bh

the base times the height is 9*12, or 108.

you then multiply that by 1/2. you could also just divide it by 2 and get the same answer.

Then you have your answer, which is B. 54 ft²

B.

area of a triangle = B*H/2

9*12/2

9*6

54