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Published byRussell Hemmingway Modified over 2 years ago

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Picture This! Index Card Area #1 rectangles and triangles

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get a 3'' x 5'' index card

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mark off each inch

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how many square inches?

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The area of this rectangle is 15 square inches

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Area of a rectangle base x height =

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cut the rectangle in half diagonally Now for a triangle: a triangle!

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The triangle is half of the rectangle A triangle = A rectangle 2

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Area of a triangle base x height 2 =

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Whats the area of this rectangle? 5'' x 3'' = 15 square inches

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Whats the area of this triangle? 5'' x 3'' = 7.5 square inches 2

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5'' x 2'' = 10 sq. in. Whats the area of this rectangle?

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5'' x 2'' = 5 sq. in. 2 Whats the area of this triangle?

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The area of each triangle every rectangle has 2 triangles in it is 1/2 of the rectangle

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2'' x 3'' = 3 sq. in. 2 Whats the area of this triangle?

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4'' x 3'' = 12 sq. in. Whats the area?

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(4'' x 3'') = 6 sq. in. 2 1

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Remember A = bh 2

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Area of a rectangle base x height =

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Area of a triangle base x height 2 =

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