17 videos in "Circles"

Circles 1  Circumference and Area

Circles 2  Circumference and Area

Pi Day

Equation of Circle 1

Equation of Circle 2

Equation of Circle 3

Equation of Circle 4

Equation of Circle 5

Equation of Circle 6

Equation of Circle 7

Equation of Circle 8

Equation of Circle 9

Equation of Circle 10

Finding Sector Angle Given Arc Length and Radius

Find Arc Length of Sector

Using Arc Length Formula to Find Circle Values

Circumference and Area of a Circle
Circles 1  Circumference and Area
Circles 1  Circumference and Area
3980 views, 1 rating  00:10:51
Part of video series Circumference and Area of Circles
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
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Easy formulas and examples for circumference and area of a circle: C = 2r * pi and A = r^2 * pi;
 Diameter of a circle  A description and explanation of what the diameter of a circle is and how to calculate other measurements from the diameter.
 Circumference of a circle  Definition of circumference of a circle, how to find it, and some interesting facts about circumference.
 Area of a circle  The definition of area of a circle as well as explanations of how to find the area of a circle is shown with several formulas.
 What is the circumference of a circle?
 What is the formula for the circumference of a circle?
 What is the exact circumference of a circle if its radius is 5 feet?
 How can you approximate the circumference of a circle using 3.14 as pi?
 How do you find the area of a circle?
 What is the formula for the area of a circle?
 How do you find the exact area of a circle if its radius is 5 feet?
 How can you approximate the area of a circle using 3.14 as pi?
 How can you remember the formulas for circumference and area of a circle?
 How can you find the exact circumference and area of a circle if r = 3?
This idea of circumference / distance around / perimeter of a circle is explained in this lesson. An example problem of finding the circumference of circles is shown and explained. This is a good introductory tutorial on finding circumference. Area of a circle is also explained and an example problem is shown.