Area of a trapezoid: Latest Lesson Update

To remember, a trapezoid, likewise described as a trapezium, is a quadrilateral with one set of identical sides and also one more pair of non-parallel sides. Like a square as well as a rectangular shape, a trapezoid is additionally flat. For that reason, it is 2D. Learn more about the area of a trapezoid.

In a trapezoid, both parallel sides are called bases. At the same time, the pair of non-parallel sides are referred to as the legs. The perpendicular range between both parallel sides of a trapezium is called the height of a trapezoid.

In essential words, the base and the height of a trapezoid, are perpendicular to each other.

The trapezoid can be both the best trapezoid (2 90-degree angles) and isosceles trapezoid (2 sides of the same length). But having one right angle is not feasible because it has a set of identical sides, which bounds it to make two right angles simultaneously.

In this post, you will undoubtedly learn:

how to discover the trapezoid area,

how to acquire the trapezoid area formula and,

precisely how to locate the area using the trapezoid area formula.

How to Find the Area of a Trapezoid?

The area of the trapezium is the area covered by a trapezium in a two-dimensional plane. It is the area enclosed in 2D geometry.

As we know, a trapezoid is composed of two triangular and also one rectangular shape. Consequently, it can determine the area by taking the sum of the areas of two triangles and one rectangle.

Area of a trapezoid formula

Area of a trapezium ADEF = ( 1/2 x AB x FB) + (BC x FB) + ( 1/2 x CD x EC).

= ( ¹/ ₂ × AB × h) + (BC × h) + ( ¹/ ₂ × CD × h).

and, = ¹/ ₂ × h × (AB + 2BC + CD).

= ¹/ ₂ × h × (FE + AD).

However, FE = b1 and also AB = b2.

Thus, Area of a trapezium ADEF,.

= ¹/ ₂ × h × (b1 + b2) … … … … (This is the trapezoid area formula).

Trapezoid Area Solution.

According to the trapezoid area formula, the trapezoid area is equal to the sum of the two bases and half the height.

Area = 1/2 x (Amount of parallel sides) x (perpendicular distance between the identical sides).

Area = 1/2 h (b1 + b2).

Where the elevation, as well as b1 and b2, are the parallel sides of the trapezoid.

How do you find the area of an irregular trapezoid?

An asymmetrical trapezoid is one that has non-parallel sides of unequal size. To discover its area, you merely need to find the amount of the bases and multiply it by half of the height.

The elevation is often missing in the question, which you can find making use of Pythagorean Theory.

Find the perimeter of a trapezoid.

You know boundary is a sum of all sizes of the outer side of a form. Consequently, the border of a trapezoid is several sizes of all four sides.

Learn about the area of a polygon in our latest blog.

Example 1.

Calculate the trapezoid area whose elevation is 5 centimeters, and the bases are 14 cm and 10 centimeters.


Let b1 = 14 cm and also b2 = 10 centimeters.

Area of trapezoid = 1/2 h (b1 + b2) cm2.

= 1/2 x 5 (14 + 10) cm2.

and, = 1/2 x 5 x 24 cm2.

= 60 cm2.

Example 2.

Locate the trapezoid area with the height as 30 mm and the bases as 60 mm and 40 mm.


Area of trapezoid = 1/2 h (b1 + b2) sq. devices.

= 1/2 x 30 x (60 + 40) mm2.

and, = 1/2 x 30 x 100 mm2.

= 1500 mm2.