Transcript Perimeter and area

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Quadrilaterals
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Area formulae
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Area calculations
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The area of a parallelogram
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The area of a triangle
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The area of a trapezium
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Finding the area of irregular polygons
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Rectangle perimeters
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Hectare forests
Do each of the forests below cover an area of
one hectare? What are the perimeters?
25 m
75 m
40 m
50 m
250 m
80 m
20 m
60 m
25m
50 m
100 m
50 m
200 m
1 hectare = 10000 m2
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Shapes made from rectangles
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Recognizing formulae
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Tangram
This Chinese puzzle is made from 7 shape pieces that fit
together to make a square with sides of 16 cm.
The intersections are all evenly spaced.
What are the areas of the individual shapes?
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