Last modified on June 11th, 2022

chapter outline


Right Trapezoid

A trapezoid is a trapezoid with one right angle (90°). It is also termed as a right angle trapezoid. Since there is one right angle at one of its base, another right angled is automatically formed at the opposite base. So in other words, we can also say that a trapezoid with two right angles is a right trapezoid.

Right Trapezoid


Right Trapezoid Properties
  1. Has 2 adjacent right angles; ∠ABC and ∠DAB are 90°
  2. Has all the other properties of a trapezoid


Area of a Right Trapezoid Formula

Let us solve an example to understand the concept better.

Solved Example

Calculate the area of a right trapezoid with bases 21 cm and 15 cm and height 11 cm.


As we know,
Area (A) = ½ (a + b) × h, here a = 21 cm, b = 15 cm, h = 11 cm
∴A = ½ (21 +15) ×11
= 198 cm2


Last modified on June 11th, 2022

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