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Geometry2010p6
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Angles of Elevation and Depression
Area and Circumference
Basic Trig
Calculators
Circle Terminology
Circles
Classifying Quadrilaterals
Cones
Cylinders
Exterior Angles
Find the area of a Sector
Finding Arc Length and Measure
Finding Central and Inscribed Angle Measurements
Finding Lateral Area
Finding Surface Areas
Finding Surface Areas 2
Finding Volume
Geometric Mean
How to Represent 3D objects
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Area and Circumference
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The circumference of a circle is the distance around the outside of the circle. It could also be called the perimeter of the circle.
equation for circumference is C=2π(r) or C=diameter(π)
calculating the circumference
Calculating the Circumference of a Circle
The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle.
If a circle has a diameter of 4, its circumference is 3.14*4=12.
If you know the radius, the diameter is twice as large.
area of a circle
AREA
*Circle Area = π • r²
as you can tell to find area you take the radius squared and times it by pi
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The circumference of a circle is the distance around the outside of the circle. It could also be called the perimeter of the circle.
 equation for circumference is C=2π(r) or C=diameter(π)
calculating the circumferenceCalculating the Circumference of a Circle
 The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle.
 If a circle has a diameter of 4, its circumference is 3.14*4=12.
 If you know the radius, the diameter is twice as large.
area of a circleAREA
*Circle Area = π • r²