Objective Labels Template

Lesson Objective:

Today I am going to learn how to calculate the area of a right-angled triangle by using knowledge of rectangle areas. I will explore the relationship between the two shapes and understand how to apply the formula for the area of a rectangle to find the area of a triangle.

I will know I have learned the knowledge by answering the following questions:

• How can the area of a right-angled triangle be estimated using a squared grid?
• What is the relationship between the area of a right-angled triangle and the area of a corresponding rectangle?
• What steps must be taken to modify the formula for the area of a rectangle to calculate the area of a right-angled triangle?
• Can I apply the formula to calculate the area of various right-angled triangles with different lengths and heights?