That depends on what information that you do know. If you have length of a leg (I'm not sure if that is the correct term or not) and distance from that leg's vertex to a point directly below the other 'vertex', then you have a little right triangle and can use the Pythagorean Theorem (a2 + b2 = c2), where c is the longest side. So in this case you know b and c, so a2 = c2 - b2.
Area of a trapezoid: 0.5*(sum of its parallel sides)*height
Area of a trapezoid = 0.5*(sum of parallel sides)*height
For a parallelogram, take the base times the height. For a trapezoid, take the smaller base and times it by the height.
Area of a trapezoid: 0.5*(sum of parallel sides)*height
A trapezoid is a polygon. Therefore, a trapezoid has no height
Area of a trapezoid: 0.5*(sum of its parallel sides)*height
The height of the trapezoid is also needed to find its area which is as follows:- Area of a trapezoid = 0.5*(sum of bases or parallel sides)*height
Area of a trapezoid = 0.5*(sum of parallel sides)*height
If the lengths of the bases are also given then rearrange the area of the trapezoid formula so that the height is the subject.
To measure the area of a trapezoid, you can use the formula: Area = (1/2) * (sum of the lengths of the parallel sides) * (height). Simply add the lengths of the two parallel sides together, multiply by the height, and then divide by 2 to find the area of the trapezoid.
Height = Area*2/sum of parallel sides
The area of a trapezoid is equal to the height, multiplied by the average of the two widths.
For a parallelogram, take the base times the height. For a trapezoid, take the smaller base and times it by the height.
Area of a trapezoid: 0.5*(sum of parallel sides)*height
A trapezoid is a polygon. Therefore, a trapezoid has no height
Area = 1/2*(sum of parallel sides)*height
To find the area of a trapezoid, you need the lengths of the two parallel sides (bases) and the height. However, the dimensions given (13 and 20) appear to specify the lengths of the bases without mentioning the height. If we assume the height is also provided or inferred, the area formula is ( \text{Area} = \frac{1}{2} \times (b_1 + b_2) \times h ). Without the height, we cannot calculate the area definitively.