March 20, 2012 Aim: How Do We Find The Area Of A Circle?

Circle Area Conjecture:

-The area of a circle is given by the formula__,where "A" is the area and "r" is the radius of the circle.

  

Examples:

Example 1:	The radius of a circle is 3 inches. What is the area?
Solution:
	= 3.14 · (3 in) · (3 in)
	= 3.14 · (9 in2)
	= 28.26 in2

http://www.mathgoodies.com/lessons/vol2/circle_area_part3.html 

Now You Try It:

1.The radius of a circle is 9 centimeters. What is the area?

ANSWER BOX:   = cm²  

RESULTS BOX: 

2.The diameter of a circle is 12 inches. What is the area?

ANSWER BOX:   = in²  

RESULTS BOX: 

http://www.mathgoodies.com/lessons/vol2/circle_area_part3.html