Lesson: Finding the Area of a Rhombus Using Diagonals Mathematics • 6th Grade

In this lesson, we will learn how to find the area of a rhombus in terms of its diagonal lengths as half the product of these lengths.

Lesson Plan

Students will be able to

use models to show that the area of a rhombus can be found using diagonal length diagonal length,
find the area of a rhombus when given its diagonal lengths,
solve problems involving finding the area of a rhombus using diagonals.

Lesson Video

Lesson Worksheet

Q1:

The height of a rhombus is 4.1 cm, its base length is 6.6 cm, and the length of one of its diagonals is 4.3 cm. Find, to the nearest tenth, the length of the other diagonal.

Q2:

The figure shows a rhombus within a rectangle. Find the area of the rhombus to two decimal places.

Q3:

A rhombus has diagonals 25 and 11. What is its area?