1 circle formulae 2 the area of a circle tandi clausen-may click the mouse
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Circle Formulae 2
The area of a circle
Tandi Clausen-May
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The area
of a circle
Tandi Clausen-May Click the mouse
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We saw in Circle Formulae 1 that…
Circumference= × Diameter
Now, what about the area?
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Imagine a circle made out of strands of beads.
Open it out.
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circumference
radius (half the diameter)
Let’s watch that again.
It’s a triangle!
base = circumference
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height = radius (half the diameter)
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circumference
radius (half the diameter)
= Circumference × Radius 2
Area of the triangle circle
Area of the triangle
We know how to find the area of a triangle.
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= Base × Height 2
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= Circumference × Radius 2
Area
Summary
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The End
Tandi Clausen-May
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