2007-11-20 04:12:55 · 4 answers · asked by Ginger 2 in Science & Mathematics ➔ Mathematics
solution:
Area = h ((b1 + b2) / 2)
let b1 = base1 (bottom) , b2 = base2/top , h = height / side
substitute the value in the given question,
b1 = 21 , b2 = 9 , h = 6
area = 6 (( 21 + 9) / 2)
area = 6 ( 30/ 2)
area = 6 (15)
area = 90in^2 is the answer.
2007-11-20 04:31:03 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Is the first side an altitude (height) of the trapezoid? Or do you have an angle?
The formula for the area of a trapezoid is:
average of bases x height.
½(9 + 21) * 6
= ½(30) * 6
= 15 * 6
= 90 sq. in.
2007-11-20 04:24:19 · answer #2 · answered by Puzzling 7 · 0⤊ 1⤋
You need more information. From what you have written, there is no way to determine the height of the trapezoid.
2007-11-20 04:24:40 · answer #3 · answered by chcandles 4 · 1⤊ 0⤋
area of trapezoid is 1/2(b1+b2)*h
2007-11-20 04:21:59 · answer #4 · answered by electric 3 · 1⤊ 0⤋