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Lesson: Area of a Triangle Mathematics • 6th Grade

In this lesson, we will learn how to calculate the area of a triangle given its base length and height.

Lesson Plan

Students will be able to

find the area of right triangles,
find the area of triangles,
use models to show how the area of a triangle is related to the area of a rectangle,
identify the base and height in triangles,
state the formula for the area of a triangle as ,
state the formula for the area of a triangle as area .

Q1:

Find the area of a triangle whose height is 23 cm and base length is 16 cm.

Q2:

What is the area of the triangle on the front of James’s math folder?

Q3:

The height of a right triangle is 47 cm. The base is 26 cm. What is its area?