Polygons
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The document discusses calculating the area of composite figures, which are shapes made up of two or more simple figures. It provides examples of calculating the area of individual shapes like squares, triangles, circles, and trapezoids. It then prompts working through examples of composite figures made up of multiple shapes, explaining that the total area is found by adding the individual areas of each shape together.
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Polygons
- 1. Area of Composite Figures
- 3. It won’t hurt a bit
- 4. What is this?Areas is the space around an item.Composite Figures are figures made of two or more figures.
- 5. Yea I know how to find area of a shapeParallelogramA=bhTriangle A=1/2 bhTrapezoidA=1/2h(b1+b2)Circle A=∏r2
- 7. Show Me. What is the area of this shape?
- 8. 32.5cmDid you multiple the height and base by ½?
- 9. Ok… So? You said a composite figure was two or more shapes?
- 10. Right so look at the figure what two shapes create it?What two shapes make up this figure?
- 11. What did you see?Square and Triangle
- 12. What the next step?Area of the square=bhA=10x10Area of Triangle=1/2bhA=1/2x6x10 Where did you find that 10?The area is 100 and 30, right?But what about the whole figure?We need to add the two sums.100+30=130cm2
- 13. Try this one.What shapes do you see?
- 14. What is the area of them?Circle=∏r2Triangle=1/2bh
- 15. Does that circle look like a whole?What are you going to do the answer you find?
- 17. Did you get a sum of 13.3in2?
- 18. Well Think you Got IT?