The formula for the area of a triangle is A=12bh , where b is the base of the triangle and h is the height of the triangle. What is the length of the base if the area is 22 cm2 and the height is 8 cm?
If the formula is A = 1/2 b h and we know that A = 22 and h = 8, then we can write it down as:
22 = 1/2 b 8
22 = 1/2 8b
22 = 4b / ÷ 4 (both sides)
b = 5.5
Answer: Length of the base is 5.5 cm.
Doublecheck:
1/2 5.5 8 =
= 2.75 8 =
= 22
Correct :)