Area of trapezoids, derive area formula of trapezoids, solve problems using area of trapezoids, examples, worksheets, examples and step by step solutions, How to find the height of a trapezoid given the area, How to use the area of a trapezoid to find a missing base length How to find the area of a trapezoid. The area of a polygon is that the amount of square units within that polygon. Area is 2-dimensional like a carpet or an area rug, now what is a trapezoid and how to find the area of a trapezoid? Trapezoid special cases. The orange figures also qualify as parallelograms. A right trapezoid (also called right-angled trapezoid) has two adjacent right angles. Right trapezoids are used in the trapezoidal rule for estimating areas under a curve. An acute trapezoid has two adjacent acute angles on its longer base edge, while an obtuse trapezoid has one acute and one obtuse angle on each base. How to Calculate the Area of a Trapezoid. A trapezoid, also known as a trapezium, is a 4-sided shape with two parallel bases that are different lengths. The formula for the area of a trapezoid is A = ½(b1+b2)h, where b1 and b2 are the. Area of a trapezoid is found with the formula, A=(a+b)/2 x h. Learn how to use the formula to find area of trapezoids. For example, the area of a trapezoid that has bases of 10 centimeters and 12 centimeters and a height of 8 centimeters is 1/2 times (10 + 12) times 8, which simplifies to 1/2 times 22 times 8, or. In order to calculate the area of a trapezoid, you must use the following formula: S = ((a+b)*h)/2, where a and b are the bases of the trapezoid, h is the height of the trapezoid. In that case, if the area and lengths of bases are known, find the elevation by the formula: h = (2*S)/(a+b) How to Find the Area of a Trapezoid. To find the area of any trapezoid, start by labeling its bases and altitude. In our trapezoid, label the longer base a and the shorter base b.Label a line perpendicular to the two bases h for height or altitude of the trapezoid. Notice we did not label the legs. Trapezoid (Jump to Area of a Trapezoid or Perimeter of a Trapezoid). A trapezoid is a 4-sided flat shape with straight sides that has a pair of opposite sides parallel (marked with arrows below):