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Picture This! Index Card Area #1 rectangles and triangles.

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Presentation on theme: "Picture This! Index Card Area #1 rectangles and triangles."— Presentation transcript:

1 Picture This! Index Card Area #1 rectangles and triangles

2 get a 3'' x 5'' index card

3 mark off each inch

4 how many square inches?

5 The area of this rectangle is 15 square inches

6 Area of a rectangle base x height =

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

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

9 Area of a triangle base x height 2 =

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

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

12 5'' x 2'' = 10 sq. in. Whats the area of this rectangle?

13 5'' x 2'' = 5 sq. in. 2 Whats the area of this triangle?

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

15 2'' x 3'' = 3 sq. in. 2 Whats the area of this triangle?

16 4'' x 3'' = 12 sq. in. Whats the area?

17 (4'' x 3'') = 6 sq. in. 2 1

18 Remember A = bh 2

19 Area of a rectangle base x height =

20 Area of a triangle base x height 2 =


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