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Area of Rectangles Return to table of contents. Area - The number of square units (units 2 ) it takes to cover the surface of a figure. ALWAYS label units.

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Presentation on theme: "Area of Rectangles Return to table of contents. Area - The number of square units (units 2 ) it takes to cover the surface of a figure. ALWAYS label units."— Presentation transcript:

1 Area of Rectangles Return to table of contents

2 Area - The number of square units (units 2 ) it takes to cover the surface of a figure. ALWAYS label units 2 !!!

3 How many 1 ft 2 tiles does it take to cover the rectangle? Use the squares to find out! Look for a faster way than covering the whole figure. 12 ft 6 ft

4 A = length(width) A = lw A = side(side) A = s 2 The Area (A) of a rectangle is found by using the formula: The Area (A) of a square is found by using the formula:

5 65What is the Area (A) of the figure? 15 ft 6 ft

6 66Find the area of the figure below. 7

7 67Dr. Dan wants to keep his kitten from running through his flower bed by putting up some fencing. The flower bed is 10 ft. by 6ft. Will Dr. Dan need to know the area or the perimeter of his flower bed to keep his kitty from trampling the flowers? AArea BPerimeter

8 68Now solve the problem.... Dr. Dan wants to keep his kitten from running through his flower bed by putting up some fencing. The flower bed is 10 ft. by 6ft. How much fencing will he need?

9 Area of Parallelograms Return to table of contents

10 Area of a Parallelogram Let's use the same process as we did for the rectangle. How many 1 ft 2 tiles fit across the bottom of the parallelogram?

11 Area of a Parallelogram. Let's use the same process as we did for the rectangle. If we build the parallelogram with rows of 14 ft 2, what happens? How tall is the parallelogram? How can you tell? 14 ft

12 How does this help us find the area of the parallelogram? 14 ft How do you find the area of a parallelogram? 4 ft

13 A = base(height) A = bh The Area (A) of a parallelogram is found by using the formula: Note: The base & height always form a right angle!

14 Example. Find the area of the figure. 4 cm 2.2 cm 1.9 cm click to reveal

15 4 Try These. Find the area of the figures. 8 75 click to reveal 11 m click to reveal 14 m 11 m 20 m

16 69Find the area. 11 ft 10 ft 12 ft

17 70Find the area. 17 in 10 in 12 in

18 71Find the area. 7 m 13 m 7 m 11 m

19 72Find the area.

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