Assignment Assignment for Lesson 3.1

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1 Assignment Assignment for Lesson.1 Name Weaving a Rug Area and Perimeter of Rectangles and Squares 1. An artist is weaving a rectangular rug to match the pattern shown in the figure. Use the figure to answer parts (a) through (e). Gray 1 foot Red Yellow feet Gray 5 feet 6 feet 1 foot a. Calculate the area of the yellow region. Area of yellow region l w 6() 18 square feet b. Calculate the area of the red region. Area of red region s s s 5(5) 5 square feet c. Calculate the total area of the gray regions. Area of gray regions l w l w lw (6)(1) 1 square feet d. Calculate the area of the entire rug. Show your calculation in two different ways. Area of rug l w 11(5) 55 square feet or Area of rug square feet e. Suppose that the artist wants to add a braid trim around the edges of the rug. How many feet of braid trim will the artist need? 010 Carnegie Learning, Inc. Perimeter of rug l w (11) (5) feet The artist will need feet of braid trim. Chapter l Assignments 49

2 . Suppose you want to paint a rectangular mural. You want the perimeter of the mural to be feet. Sketch three rectangles on the grid shown to represent three possible sizes for your mural. Each square on the grid represents a square that is one foot long and one foot wide. Which of the three murals has the greatest area? Which of the three murals has the least area? Show your work. Sample answer: Rectangle 1 Rectangle Rectangle 010 Carnegie Learning, Inc. Rectangle 1: Rectangle : Perimeter 4(8) feet Perimeter (10) (6) feet Area 8(8) 64 square feet Area 10(6) 60 square feet Rectangle : Perimeter (1) (4) feet Area 1(4) 48 square feet Rectangle 1, which represents the mural with a length of 8 feet and a width of 8 feet, has the greatest area. Rectangle, which represents a mural with a length of 1 feet and a width of 4 feet, has the least area. 50 Chapter l Assignments

3 Name. A rectangle has an area of 16 square centimeters and a width of 9 centimeters. What is the length of the rectangle? A lw 16 9l 14 l The length of the rectangle is 14 centimeters. 4. A square has a perimeter of 68 inches. What is the length of a side of the square? P 4s 68 4s 17 s The length of a side of the square is 17 inches. 5. A rectangle has an area of 6 square feet and a length that is 4 times the width. What are the dimensions of the rectangle? Let x represent the width of the rectangle. Then 4 x represents the length. A lw 6 4x 9 x x The width of the rectangle is feet and the length of the rectangle is 4() 1 feet. 010 Carnegie Learning, Inc. Chapter l Assignments 51

4 Assignment Assignment for Lesson. Name Boundary Lines Area of Parallelograms and Triangles Calculate the area of each figure. Each square on the grid represents a square that is one meter long and one meter wide. 1.. Area 1(9) 117 square meters Area 1 (8)(11) 44 square meters. An artist receives a request from a client to create a rug that is the shape of a parallelogram. The artist charges $5 per square foot of rug. The client decides to pay $600 for the rug. Draw two different designs for the rug on the grid. What is the area, base, and height of each rug? Show your work. Sample answer: A 010 Carnegie Learning, Inc. B square feet 5 Each rug must have an area of 4 square feet. Rug A: Rug B: Area 4 square feet Area 4 square feet Base 6 feet Base 8 feet Height 4 feet Height feet Chapter l Assignments 5

5 4. You are making a kite out of nylon fabric. The height of the kite will be 6 inches and the widest part of the kite will be 4 inches as shown in the diagram. How much nylon fabric will you need to make the kite? Write the answer in square inches and square feet. 4 inches 6 inches Area of left triangle 1 (6)(1) 16 square inches Area of right triangle 1 (6)(1) 16 square inches Total area of kite square inches 4 square inches 1 square foot square feet 144 square inches You will need 4 square inches, or square feet, of nylon fabric to make the kite. 5. The sail on a boat is triangular and its area is 16 square feet. The base of the sail is 18 feet. What is the height of the sail? A 1 bh 16 1 (18)h 4 h The height of the sail is 4 feet. 010 Carnegie Learning, Inc. 54 Chapter l Assignments

6 Name 6. A triangular window in a beach house has a height of 48 inches and contains 178 square inches of glass. What is the base of the window? A 1 bh (48)b 7 b The base of the window is 7 inches. 010 Carnegie Learning, Inc. Chapter l Assignments 55

7 Assignment Assignment for Lesson. Name The Keystone Effect Area of a Trapezoid Calculate the area of each trapezoid. Each square on the grid represents a square that is one inch long and one inch wide. 1.. Area 1 (16 8)(8) Area 1 (1 7)(7) 96 square inches 70 square inches. The height of a trapezoid is 7 inches and the bases are 7 inches and 17 inches. What is the area of the trapezoid? A 1 (7 17)(7) 1 (4)(7) 84 The area of the trapezoid is 84 square inches. 4. Can the bases of a trapezoid be the same length? Explain. No. The bases cannot be the same length. If the bases are the same length, then the figure is a parallelogram and not a trapezoid. 010 Carnegie Learning, Inc. Chapter l Assignments 57

8 5. The area of a trapezoid is 09 square yards and the bases are 15 yards and yards. What is the height of the trapezoid? 09 1 (15 )h 09 19h 11 h The height of the trapezoid is 11 yards. 6. The area of a trapezoid is 150 square meters. The height is 10 meters and one base is two meters longer than the other base. What is each base? Let x represent one base. Then x represents the other base (x x )(10) 150 5(x ) x x 14 x One base is 14 meters and the other base is meters. 7. The area of a trapezoid is 5 square feet. The height is 4 feet and one base is twice the length of the other base. What is each base? Let x represent one base. Then x represents the other base. 010 Carnegie Learning, Inc. 5 1 (x x)(4) 5 1(x) 5 6x 7 x One base is 7 feet and the other base is (7) 14 feet. 58 Chapter l Assignments

9 Name 8. The height of a trapezoid is 4 units and the bases are units and 7 units. a. Draw the trapezoid on the grid below if the trapezoid is isosceles. Then calculate the area of the trapezoid. A 1 ( 7)(4) 1 (10)(4) 0 square units b. Draw the trapezoid on the grid below if the trapezoid contains one right angle. Then calculate the area of the trapezoid. A 1 ( 7)(4) 1 (10)(4) 0 square units c. Do the trapezoids in parts (a) and (b) have the same area? Explain. Yes. The trapezoids have the same area. Even though they are different shapes, they have the same base and height, and the base and height are the only measurements that determine the area of a trapezoid. 010 Carnegie Learning, Inc. Chapter l Assignments 59

10 Assignment Assignment for Lesson.4 Name Signs, Signs, Every Place There Are Signs! Area of Regular Polygons Calculate the area of each regular polygon ft 5.9 cm 18 ft 5 cm A 1 (18)(1.4)(5) A 1 (5)(5.9)(10) 558 square feet 94.5 square centimeters. A regular heptagon has a side length of 4 inches and an apothem of 4.9 inches. What is the area of the regular heptagon? A 1 (4)(4.9)(7) The area of the regular heptagon is square inches. 010 Carnegie Learning, Inc. 4. A stop sign has a perimeter of 160 inches and an apothem of 4.1 inches. What is the area of the stop sign? A 1 (160)(4.1) 198 The area of the stop sign is 198 square inches. Chapter l Assignments 61

11 5. A regular nonagon has an area of 78 square yards and an apothem of 10.5 yards. What is the length of a side of the regular nonagon? 78 1 (l)(10.5)(9) l 8 l The length of a side of the regular nonagon is 8 yards. 6. A regular polygon has an area of 10,080 square meters. The length of a side of the polygon is 0 meters and the apothem is 56 meters. What type of regular polygon is this? 10,080 1 (0)(56)(n) 10, n 1 n The regular polygon has 1 sides. Therefore, the polygon is a regular 1-gon. 7. A quilt is made by sewing together pieces of material that are shaped like regular hexagons. Each hexagon has an apothem of 1.7 inches and a perimeter of 1 inches. About how many regular hexagons will it take to make a quilt that is a 6-foot by 8-foot rectangle? Show all your work. Area of each hexagon 1 (1)(1.7) 10. square inches Area of the quilt (6 ft) (8 ft) (7 in.)(96 in.) 691 square inches Number of hexagons needed It will take approximately 678 hexagons to make the quilt. 010 Carnegie Learning, Inc. 6 Chapter l Assignments

12 Assignment Assignment for Lesson.5 Name Say Cheese! Area and Circumference of a Circle Calculate the circumference and area of each circle. Use.14 to approximate. Each square on the grid represents a square that is one centimeter long and one centimeter wide. 1.. C d cm C d cm A r cm A r cm. A circle has a diameter of 4 inches. What are the circumference and radius of the circle? Write your answers in terms of. 010 Carnegie Learning, Inc. C d 4 A r 89 The circumference of the circle is 4 inches and the area is 89 square inches. 4. A circle has a radius of 15 feet. What are the circumference and area of the circle? Write your answers in terms of. C d 0 A r 5 The circumference of the circle is 0 inches and the area is 5 square inches. Chapter l Assignments 6

13 5. Complete the table. Use.14 to approximate. Circle Radius Diameter Circumference Area Circle A 1 ft ft 6.8 ft.14 ft Circle B 8 m 56 m m m Circle C 8 yd 16 yd 50.4 yd yd Circle D 16 in. in in in. 6. What is the area of the annulus shown? Use.14 to approximate. Area of larger circle: 10 m 7.5 m A r (10 ) m Area of smaller circle: A r (7.5 ) m Area of annulus: A m The area of the annulus is approximately square meters. 7. Suppose that x represents the radius of circle A in inches. The radius of circle B is three times the radius of circle A. Use this information to answer the following questions. a. Write an expression for the diameter of circle A. x b. Write an expression for the radius of circle B. x c. Write an expression for the diameter of circle B. 6x 010 Carnegie Learning, Inc. 64 Chapter l Assignments

14 Name d. Write expressions in terms of for the circumferences of circles A and B. How does the circumference of circle B compare to the circumference of circle A? Circumference of circle A: Circumference of circle B: C d x C d 6 x The circumference of circle B is three times the circumference of circle A. e. Write expressions for the areas of circles A and B. How does the area of circle B compare to the area of circle A? Area of circle A: Area of circle B: A r x A r (x) 9x The area of circle B is nine times the area of circle A. 010 Carnegie Learning, Inc. Chapter l Assignments 65

15 Assignment Assignment for Lesson.6 Name Installing Carpeting and Tile Area and Perimeter of Composite Figures Calculate the area of each figure. Use.14 to approximate ft. 7 ft 7 ft 16 m 7 ft 7 ft 6 ft 9 m 8 m 7 m 5 ft 7 ft 5 ft 14 m A bh 1 ap bh A 1 bh 1 (b b )h 1 1 r bh 1 ap 1 (8(14) (8 16)7 64 ) (5)(6) 1 (6)(4) 1 ( ) 186 square feet square meters Draw an example of each term.. circle 4. polygon Circle C C A B Polygon ABCD Students may draw different polygons. Ensure that each figure fits the definition of a polygon. D C 010 Carnegie Learning, Inc. Chapter l Assignments 67

16 5. composite figure 6. area Area = 1 square units Students may draw different composite figures. Ensure that each figure fits the definition of a composite figure. Students may draw different figures, but each drawing should clearly express the concept of area. 010 Carnegie Learning, Inc. 68 Chapter l Assignments

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