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1 Circle Formulae 2 The area of a circle Tandi Clausen-May Click the mouse
2 Click the mouse only when you see or If you click too soon you will miss the best bits. Click the mouse Click to see Click the mouse
3 The area of a circle Tandi Clausen-May Click the mouse
4 We saw in Circle Formulae 1 that… Circumference = × Diameter Now, what about the area?
5 Imagine a circle made out of strands of beads. Open it out. Click the mouse Click to see the circle open
6 circumference radius (half the diameter) Let’s watch that again. It’s a triangle! base = circumference Click to see the circle open again height = radius (half the diameter) Click the mouse
7 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. Click the mouse = Base × Height 2
8 = Circumference × Radius 2 Area Summary Click the mouse
9 The End Tandi Clausen-May
1 The Circumference of a Circle Teaching Mathematics Visually and Actively Tandi Clausen-May.
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1 Tandi Clausen-May Teaching Maths to Pupils with Different Learning Styles London: Paul Chapman, 2005 Click the mouse. Click the mouse only when you seeClick.
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