Area+of+a+Circle

Danae Ingwaldson

Area of a Circle

Objective: Learn how to find the area of a circle with a formula.

For this lesson you will learn how to find the area of a circle using the created formula. It is simple to do once you have been taught the formula. The area of a circle is the square units that fit within the whole circle. To find the amount of square units you can fit you use the formula area = pi times radius squared. The radius of a circle is half of the diameter. The diameter is the distance across the middle of the circle. Pi is 3.14. So for example if you have a circle that has a diameter of 8 you would first divide 8 by 2 to find the radius. You are then left with 4 for your radius.

The next step would be to plug the number 4 and 3.14 (pi) into your formula. area=3.14 times 4 squared.

After you plug it into your formula square off 4 to get 16 and multiply that by 3.14. Your answer should be 50.24 squared.

That is the simple way to find the area of a circle.

Just remeber __**a=pi(r^2)**__

Assignment: On page 431 of your textbook do numbers 7-29 odd. All the problems are finding the area of a circle.

  