Key Concept
What is meant by the term area?
The enclosed surface of a 2-D plane shape.
Given the diameter of a circle, what should you do first in order to find the area of that same circle?
Half the diameter in order to find the radius which is needed to find the area of the circle?
Can we calculate the area of a circle given the diameter?
Yes.
Given the area of a circle, how can you solve for the radius?
Work backward by changing the subject of the formula.
What is the formula to calculate area of a circle?
πr2
How does circumference of a circle differ from area?
Circumference is the distance around the border of a circle and while area is the space enclosed inside of the circle.
What are the estimated values of pi?
3.14 and 22/7
A circular fishpond has diameter 2.4m, using 3.14 as pi what is the area of the fishpond?
4.5216m2
What is the area of a circle with radius 5cm? Using pi= 3.14
78.5cm2
The cross section of a circular post has area of 64π, what is the radius of the post?
8