Thursday, March 8, 2012

Finding the Area of a Circle - Math Module

Finding the Area of a Circle

How to find the area of a circle?
The area of a circle can be found by multiplying pi ( π = 3.14) by the square of the radius
If a circle has a radius of 9, its area is 3.14 x 9 x 9 = 254.34 square units
If you know the diameter, the radius is 1/2 as large.

The area of a circle with Radius = 9 cm,
Area =  is 254.34 square cm

Use the Formula
A = π r2
Area = pi times radius squared

Watch this video first before downloading the Pptx

PowerPoint presentation for interactive whiteboard
Math Interactive Whiteboard Resources