AREA OF CIRCLE
When we find the area of a figure, we divide it up into square units, such as square centimeters. This is easy for a figure like a rectangle, which has straight sides, but how can we find the area of a circle in terms of square units?
By working through following Investigation, students will discover a formula that they can use to find the area of circle.
We only can do 3 types of methods of proving the area of circle
Method # 1
From the Investigation, students discovery that the area of a circle with radius r units is given by
Resources : International Mathematics 2 for the Middle Years Chapter 12 Circles