1. Area of a Rectangle = base x height
4cm
6cm
Area = base x height
Area = 4 x 6
Area = 24cm2
Area of a Rectangle = base x height

2. Area of a Rectangle = base x height
If we split the rectangle in half, what shape do we make?
4cm
6cm
Area = 24cm2
Area of a Rectangle = base x height

3. Area of a Rectangle = base x height
What is the area of the triangle?
4cm
6cm
Area = 24cm2
Area = 24 ÷ 2
Area = 12cm2
Area of a Rectangle = base x height

4. Area of a Rectangle = base x height
What is the area of the triangle?
Area of rectangle =
5 x 4
= 20cm2
5cm
Area of triangle =
20 ÷ 2
= 10cm2
4cm
Area of a Rectangle = base x height

5. Area of a Rectangle = base x height
What is the area of the triangle?
Area of rectangle =
3 x 6
3cm
= 18cm2
Area of triangle =
18 ÷ 2
6cm
= 9cm2
Area of a Rectangle = base x height

6. Area of a Rectangle = base x height
What is the area of the triangle?
Area of rectangle =
6 x 7
= 42cm2
6cm
Area of triangle =
42 ÷ 2
= 21cm2
7cm
Area of a Rectangle = base x height

7. Can we write a formula to find the area of a triangle?
What are the sides called?
Area = base x height 2
height
base