Area of Trapezoid Calculator

To calculate the area of a trapezoid, add the lengths of its two parallel bases, multiply the sum by the perpendicular height, and divide by 2. Formula: Area = ((Base 1 + Base 2) × Height) ÷ 2 Enter both base lengths and the height into the trapezoid area calculator to get your result instantly.

The formula for the area of a trapezoid is A = ½(a + b)h, where a and b represent the parallel bases and h represents the perpendicular height. The result is expressed in square units, such as cm², m², or ft².

Enter the lengths of the two parallel bases and the perpendicular height into the calculator. Select the appropriate measurement units, then calculate the area. The calculator can display the result in square units and show the steps used to obtain it.

The terminology depends on the country. In American English, a trapezoid commonly means a quadrilateral with at least one pair of parallel sides. In British English, a trapezium generally refers to a quadrilateral with one pair of parallel sides. Check the definition used by your textbook or course.

You can calculate the area without being given the height directly if you have enough other measurements to determine it. Depending on the shape, these may include the two parallel bases, the non-parallel sides, or suitable angles. Once the perpendicular height is calculated, use the standard trapezoid area formula.

Yes, provided the measurements and geometric constraints determine a valid trapezoid. If the two parallel bases and both non-parallel sides are known, the perpendicular height can be calculated when the geometry is valid. The area can then be found using the standard formula.

A right trapezoid has a leg perpendicular to its parallel bases. That perpendicular leg gives the height. Add the two parallel base lengths, multiply the sum by the height, and divide by 2.

Use the same area formula as for any trapezoid: A = ½(a + b)h. An isosceles trapezoid has equal non-parallel sides. If its two bases and equal side length are known, the height can often be derived from the side length and the difference between the bases, provided the dimensions form a valid shape.

Sometimes. Three side lengths alone do not generally determine the area of an arbitrary trapezoid. However, if the shape has an additional known constraint, such as being a right trapezoid or an isosceles trapezoid, the missing measurement may be calculated.

The area may be determined using the diagonals when sufficient additional information is available, such as the angle between them or other known geometric properties. The two diagonal lengths alone are not generally enough to determine the area of every trapezoid.

Use consistent units for all linear measurements. If the bases and height are measured in centimetres, the area is in square centimetres. If they are measured in metres, the area is in square metres. You can convert the final result to another area unit when needed.

Measure both parallel bases and the perpendicular height in feet. Add the bases, multiply their sum by the height, and divide by 2. The answer will be in square feet. If your measurements use different units, convert them to feet first.

Measure both parallel bases and the perpendicular height in metres. Apply the formula A = ½(a + b)h. The resulting area will be in square metres (m²).

Add the two bases: 5 + 9 = 14 cm. Multiply by the height: 14 × 6 = 84 cm². Divide by 2 to get an area of 42 cm².

The area of a trapezoid measures a flat, two-dimensional shape in square units. The volume of a trapezoidal prism measures three-dimensional space in cubic units. To find the prism's volume, multiply the trapezoid's cross-sectional area by the prism's length.