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Published byBertha Norris Modified over 4 years ago

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What is area? The amount of space that a figure encloses The number of square units that covers a shape or figure. It is two-dimensional It is always answered in square units

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S is the side Area= side x side A= s x s

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Find the area of a square using the formula To find the area of a square, multiply the side x side Area = side x side Area = 3 m x 3 m The area is 9 m 2 3 m

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Area of a rectangle b is the base h is the height Area= base x height A= b x h You may also see this as A = l x w (Area = length x width)

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Find the area of the rectangle using the formula To find the area of a rectangle, multiply the length x width. Area= length x width The length= 6 m The width=2 m Area=6 x 2 The area is 12 m 2 6 m 2 m

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Area of a triangle B is the base H is the height Area= ½ x base x height A= ½ x b x h

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Find the area of the triangle using the formula Area = 1/2 x base x height A= 1/2 x b x h 8 m 5 m A= 1/2 x 8 x 5m A= 1/2 x 40 square meters A= 20 square meters The area is 20 m 2

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Area of a parallelogram b is the base h is the height Area= base x height A= b x h

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Find the area of parallelogram using the formula Area = base x height A= b x h A= 4 x 3 A= 12 square units The area is 12 units 2

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What is the area of this figure? It is a square Formula for the area of a square is side x side Side= 17 m Area= 17 x 17 A= 289 m 2 17 m. 17 m

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What is the area of this figure? It is a triangle 13 cm 4 cm Formula for the area of a triangle is A = ½ x base x height Base= 13 cm Side= 4 cm Area= ½ x 13 x 4 A= 26 cm 2

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What is the area of this figure? It is a parallelogram Formula for the area of a parallelogram is A = base x height Base= 3 units Height= 6 units Area= 6 x 3 A= 18 units 2

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What is the area of this figure? It is a rectangle Formula for the area of a rectangle is length x width Length= 8m Width= 3 m Area= 8 x 3 A=24 m 2 3 m 8 m

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What is the area of this figure? It is a square Formula for the area of a square is side x side Side= 12 cm Area= 12 x 12 A= 144cm 2 12 cm

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What is the area of this figure? It is a triangle Formula for the area of a triangle is ½ x base x height Base= 8 m Side= 5 m Area= ½ x 8m x 5 m A=20 m 2 8 m 5 m

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What is the area of this figure? It is a parallelogram Formula for the area of a parallelogram is A = base x height Base= 5 units Height= 5 units Area= 5 x 5 A= 25 units 2

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What is the area of this figure? It is a rectangle Formula for the area of a rectangle is A = length x width Length= 13 cm Width= 4 cm Area= 13 x 4 A= 52 cm 2 13 cm 4 cm

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What is the area of this figure? It is a rectangle 7 cm 16 cm Formula for the area of a rectangle is A = length x width Length= 16 cm Width= 7 cm Area= 16 x 7 A= 112 cm 2

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What did you learn? What is area? How are the units of area usually expressed? How many dimensions is area? What does the “S” mean in the formula for the area of a square? What is the formula for the area of a square? What is the formula for the area of a rectangle? What does the “h” stand for in the formula for the area of a triangle?

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More… What is the formula for the area of a parallelogram? What does the “b” stand for in the formula for the area of a triangle? What does the “h” stand for in the formula for the area of a rectangle? What is the formula for the area of a rectangle? What are the four formulas we have learned today?

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Closure: Remember Formulas! Square: A = s x s Rectangle : A = b x h Triangle: A = ½ x b x h Parallelogram: A= b x h

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http://www.ideal- resources.com.au/products/secondary_maths_pack/Cl ass/wc3.swf http://www.ideal- resources.com.au/products/secondary_maths _pack/Class/wc2.swf

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