1. Area

2. Area of a Circle
The area A of a circle equals the product of π and the square of its radius r.
Find the area of the circle. Round your answer to the nearest hundredth.
2 in.
The area of the circle is in².

3. Area of a parallelogram
To find the area of a parallelogram, you multiply the shape’s base and height.
A = b(h)
Find the area of the following shape.
A = (10)(7)
A = 70 cm²
7 cm
10 cm

4. Area of a Triangle
If you take a parallelogram and split it in half, you create two triangles.
For the area formula of a triangle,
take the formula for the area of a
parallelogram and split it in half.
A = (b(h))÷2
A = (3.7(2.4)) ÷2
A = (8.88) ÷2
A = 4.44 cm²

5. Area of a Trapezoid
A trapezoid is a quadrilateral with only one pair of parallel sides.
A=½4(6+3)
A=½4(9)
A=18m²

6. Practice Problems – Find the area of the following shapes.
15 mm.
6 in.
6 in.
12 mm.
29 ft.
21 ft.
33 cm.
19 ft.