# Math

A trapezoid has an area of 312cm2. If the bases are 3cm and 20cm, find the height.

1. 👍
2. 👎
3. 👁
1. average base = 23/2
so
23 h /2 = 312
h = 27.1

1. 👍
2. 👎

## Similar Questions

1. ### 9th grade algebra

solve for h The formula for finding the area of a trapezoid is A = 1/2 (b1 + b 2)h where A represents the area of the trapezoid, b1 and b2 are bases, and h represents the height. Solve the formula for h. I know the answer is h =

2. ### math

a trapezoid has an area of 36 meters squared and altitude of 2 meters. its two bases in meters have ratio of 4:5 the bases are ___.

3. ### GEOMETRY HELP PLEASE

The bases of trapezoid $ABCD$ are $\overline{AB}$ and $\overline{CD}$. We are given that $CD = 8$, $AD = BC = 7$, and $BD = 9$. Find the area of the trapezoid.

4. ### Math

The triangle and the trapezoid have the same area. Base b2 is twice the length of base b1. What are the lengths of the bases of the trapezoid? What do you do after you find the area of the triangle? Triangle: base=21 cm,

1. ### Math 7B

1. Find the area of the trapezoid. (1 point) A. 270 mm2 B.375 mm2 C.750 mm2 D.3780 mm2 2. Find the area of the trapezoid. (1 point) A.1543.5 m2 B.220.5 m2 C.294 m2 D.588 m2 3. A trapezoid has an area of 24 square meters. The

2. ### AP Calculus

The sum of the two bases and the altitude of a trapezoid is 16ft. a) Define the area A of the trapezoid as function of its altitude. b) Find the altitude for which the trapezoid has the largest possible are. (Optimization)

3. ### Math plz help one qustion only!!!!!!!!!!!!!!!!!!!!

A trapezoid has an area of 24 square meters. The lengths of the bases of the trapezoid are 5 meters and 7 meters. What is the height of the trapezoid? • 4 meters************ • 144 meters • 2 meters • 1 meter

4. ### Math

The bases of trapezoid ABCD are AB and CD. Let P be the intersection of diagonals AC and BD. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.

use the formula for the area of a trapezoid A=h(b1+b2) where A is area , b1 and b2 are (-----) 2 the lenght of the bases and h is the height, to answer the qustion. How many square feet of grass are there on a trapezoidal field

2. ### Math

The sides of two similar trapezoids are in a ratio of 1:3. The area of the smaller trapezoid is 12 inches squared. Find the area of the larger trapezoid

3. ### Math

1.(1 point) Find the area of the trapezoid. 14mm,15mm,36mm A.270mm2 B. 375mm2 C. 750mm2 D. 3780mm2 2.(1 point) Find the area of the trapezoid. 7m,21m,21m A. 1543.5m2 B. 220.5m2 C. 294m2 D. 588m2 3.(1 point) A trapezoid has an area

4. ### geometry

the bases of a trapezoid have measures of 16 and 8. find the measure of the median.