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Finding the Area of Geometric Figures. Unit 7. Area of a Square/Rectangle. Length x width Ex . 1 Area = 15 x 5 Area = 75 cm 2. Length x width Ex. 2 Area = 6 x 6 Area = 36 cm 2. 15 cm. 5 cm. 6 cm. Area of a Triangle. A Triangle is half of a square or rectangle.
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Area of a Square/Rectangle Length x width Ex. 1 Area = 15 x 5 Area = 75 cm2 Length x width Ex. 2 Area = 6 x 6 Area = 36 cm2 15 cm 5 cm 6 cm
Area of a Triangle A Triangle is half of a square or rectangle. Area of a square/rectangle is length x width, Area of a triangle is length x width ÷ 2 Instead of calling the dimension length and width, we change them to base and height. Area = ½ x base x height.
Examples Ex 1. 12 cm Area = ½ base x height Area = ½ (12) (10) Area = (6) (10) Area = 60 cm2 Ex. 2 22.8 cm Area = ½ base x height Area = ½(18)(14) Area = (9)(14) Area = 126 cm2 10 cm 14 cm 18 cm
Video Area of polygons
Area of a parallelogram Just like a rectangle height Base X height base
Practice Pg 485 10-19