Math 081 Worksheet Section 8.4 v01 Spring 2011 Dressler Name 6) 12 dm Find the area of the geometric figure. 1) 5 dm Rectangle 5 m ) 6.8 m 12 units 25.5 units 2) 22.5 units Rectangle 3 m 8).9 m 20 yd 52 yd 3) 3 cm 9) 48 yd 3 4 cm yd 16 yd 10 yd 12 yd 4) 2 m 10) 4 in. 18 in. 8 in. 3 1 4 m 15 in. 5) 10 dm 11) dm d = ft Use 3.14 for π. Round to the nearest hundredth, if necessary.
12) 16) d = 8 mi d = 33 units Use 3.14 for π. Round to the nearest hundredth, if necessary. Use 22 for π. 13) 1) r = 5 mi r = 3.5 ft Use 3.14 for π. Round the answer to the nearest hundredth, if necessary. 18) Use 22 for π. 14) r = 3 in. r = 8 yd Use 3.14 for π. Round the answer to the nearest hundredth, if necessary. 19) Use 22 for π. 15) d = in. Square 8.5 ft 20) Use 22 for π. Square 9.8 cm 2
21) Square 8 1 2 mi 26) Trapezoid 8 ft 3 ft 22) 3 ft Square 3 1 5 m 2) Trapezoid 6.9 in. 5 in. 11.8 in. 23) Trapezoid 5 ft 6 ft 28) Trapezoid 8.6 in. 6 in. 9.9 in. 24) Trapezoid 4 dm 4 dm 9 dm 29) Trapezoid 9 mi 25) Trapezoid 11 dm 13. mi dm 16 mi 4 dm 30) Trapezoid 6 yd 1.4 yd 20 yd 3
31) Parallelogram 35) 4.25 dm ft 4.2 ft 3. ft 2 dm 32) Parallelogram 2 1 4 ft ft 6 ft 36) 33) Parallelogram 24 cm 25 cm 8 ft 3.3 ft 2. ft 30 cm ft 6 34) 2 yd 1 1 2 yd 11 2 yd 11 ft 8 yd 4 yd 3) 4 m 5 m 4 m 18 m 12 m 4
38) 5 cm 6 cm 5 cm 42) 3 km 23 cm 10 km 3 km 39) 3 m 2 m 18 cm Solve. 43) A drapery panel measures 3 feet by 10 feet. Find how many square feet of material are needed for six panels. 44) A drapery panel measures 5 feet by 10 feet. Find how many square feet of material are needed for six panels. 6 m 45) 81 ft 12 m Yard 40) 5 km 2 km 6 ft 50 ft House 2 km 41) 8 km 3 km 60 ft A homeowner wants to know how much grass seed to buy. First the size of the yard must be determined. Use the drawing to determine how many square feet are in the yard. 8 km 3 km 5
46) 81 ft 48) Yard 4 ft 4 ft 46 ft House 22 ft 14 ft 14 ft 4) 68 ft A homeowner wants to know how much grass seed to buy. First the size of the yard must be determined. Use the drawing to determine how many square feet are in the yard. 5 ft 14 ft 14 ft The drawing shows the end of a building that is to be bricked. If the area of the side of a brick used is 1 square foot, find the number of 10 bricks needed to completely cover the side of the building. 49) The face-off areas in ice hockey have a diameter of 30.6 ft. Find the area of a face-off circle. Use 3.1.4 for π. Round to the nearest tenth, if necessary. 50) The face-off areas in ice hockey have a diameter of 30.1 ft. Find the area of a face-off circle. Use 3.1.4 for π. Round to the nearest tenth, if necessary. The drawing shows the end of a building that is to be bricked. If the area of the side of a brick used is 1 square foot, find the number of 8 bricks needed to completely cover the side of the building. 51) A rubber ice-hockey puck has a 3.2 inch diameter. What is the area of its circular surface? Use 3.14 for π. Round to the nearest tenth, if necessary. 52) A rubber ice-hockey puck has a 2.8 inch diameter. What is the area of its circular surface? Use 3.14 for π. Round to the nearest tenth, if necessary. 53) The discus is thrown from a circular region 8 feet 2 inches in diameter. What is the area of the circle (in square inches)? Use 3.14 for π. Round to the nearest tenth, if necessary. 54) The discus is thrown from a circular region 8 feet 3 inches in diameter. What is the area of the circle (in square inches)? Use 3.14 for π. Round to the nearest tenth, if necessary. 6
55) A pizza restaurant advertises two specials. The first special is a 14-inch pizza for $10. The second special is two 6-inch pizzas for $9. Determine the better buy. (Hint: First compare the areas of the two specials and then find a price per square inch for both specials.) 62) Find the area of the skating rink. Round to the nearest tenth. 3 m 10 m 56) A pizza restaurant advertises two specials. The first special is a 16-inch pizza for $8. The second special is two 6-inch pizzas for $. Determine the better buy. (Hint: First compare the areas of the two specials and then find a price per square inch for both specials.) 63) Find the area of the window. Round to the nearest tenth. 5) Find the area of a rectangle that measures 6 inches by 4 feet. Give the area in square inches and in square feet. 58) Find the area of a rectangle that measures 4 inches by 2 feet. Give the area in square inches and in square feet. 59) A hotel is building a fitness center measuring 291 ft 64 ft. The flooring to cover the space is made of a special 3-layered cushioned tile and costs $20.00 per square foot. How much will it cost for the new flooring? 3 dm 9 dm 64) Find the area of the window. Round to the nearest tenth. 60) A hotel is building a fitness center measuring 25 53 ft. The flooring to cover the space is made of a special 3-layered cushioned tile and costs $20.00 per square foot. How much will it cost for the new flooring? 12 dm 61) Find the area of the skating rink. Round to the nearest tenth. 44 ft 4 dm
Answer Key Testname: WS8.4V01 1) 34 sq m 2) 23. sq m 3) 11 5 8 sq cm 4) 3 1 4 sq m 5) 35 sq dm 6) 30 sq dm ) 135 sq units 8) 480 sq yd 9) 42 sq yd 10) 30 sq in. 11) 38.465 sq ft 12) 50.24 sq mi 13) 38.4 sq ft 14) 200.96 sq yd 15) 4658 1 2 sq in. 16) 855 9 sq units 14 1) 8 4 sq mi 18) 28 2 sq in. 19) 2.25 sq ft 20) 96.04 sq cm 21) 2 1 4 sq mi 22) 10 6 25 sq m 23) 42 sq ft 24) 26 sq dm 25) 52.5 sq dm 26) 16.5 sq ft 2) 46.5 sq in. 28) 55.5 sq in. 29) 11.25 sq mi 30) 226.2 sq yd 31) 8.5 sq dm 32) 15 3 4 sq ft 33) 20 sq cm 34) 3 sq yd 35) 5.85 sq ft 36) 86 sq ft 3) 204 sq m 38) 39 sq cm 39) 8 sq m
Answer Key Testname: WS8.4V01 40) 69 sq km 41) 33 sq km 42) 39 sq km 43) 180 sq ft 44) 300 sq ft 45) 3908 sq ft 46) 4501 sq ft 4) 256 bricks 48) 3080 bricks 49) 35.0 sq ft 50) 11.2 sq ft 51) 8.0 sq in. 52) 6.2 sq in. 53) 539.1 sq in. 54) 693.8 sq in. 55) 14-in. pizza 56) 16-in. pizza 5) 288 sq in.; 2 sq ft 58) 96 sq in.; 2 3 sq ft 59) $32,480 60) $24,540 61) 1046.3 sq ft 62) 1054 sq m 63) 34.1 sq dm 64) 60.6 sq dm 9