55. Pet Care You want to adopt a puppy from your local animal shelter. First, you plan to build an outdoor playpen along the side of your house, as shown below. You want to lay down special dog grass for the pen's floor. If dog grass costs $1.70 per square foot, how much will you spend?

    

56. A rectangular garden has an 8-ft walkway around it. How many more feet is the outer perimeter of the walkway than the perimeter of the garden?

C Challenge

Algebra Find the area of each figure.

57. a rectangle with side lengths 2 a 5 b fraction 2 eh , over 5 b end fraction  units and 3 b 8 fraction 3 b , over 8 end fraction  units
58. a square with perimeter 10n units
59. a triangle with base ( 5 x − 2 y ) open 5 x minus 2 y close  units and height ( 4 x + 3 y ) open 4 x plus 3 y close  units

Standardized Test Prep

SAT/ACT

GRIDDED RESPONSE

60. An athletic field is a 100 yd-by-40 yd rectangle with a semicircle at each of the short sides. A running track 10 yd wide surrounds the field. Find the perimeter of the outside of the running track to the nearest tenth of a yard.

    

61. A square garden has a 4-ft walkway around it. The garden has a perimeter of 260 ft. What is the area of the walkway in square feet?
62. A ( 4 , − 1 ) eh open 4 comma negative 1 close  and B ( − 2 , 3 ) b open negative 2 comma 3 close  are points in a coordinate plane. M is the midpoint of A B ¯ . eh b bar , .  What is the length of M B ¯ m b bar  to the nearest tenth of a unit?
63. Find CD to the nearest tenth if point C is at ( 12 , − 8 ) open 12 comma negative 8 close  and point D is at (5, 19).

Mixed Review

See Lesson 1-7.

Find (a) AB to the nearest tenth and (b) the midpoint coordinates of A B ¯ . eh b bar , .

64. A(4, 1), B(7, 9)
65. A ( 0 , 3 ) , B ( − 3 , 8 ) eh open 0 comma 3 close comma b open negative 3 comma 8 close
66. A ( − 1 , 1 ) , B ( − 4 , − 5 ) eh open negative 1 comma 1 close comma b open negative 4 comma negative 5 close

See Lesson 1-6.

B G ↔ modified b g with left right arrow above  is the perpendicular bisector of W R ¯ w r bar  at point K.

67. What is m ∠ BKR ? m angle
68. Name two congruent segments.

Get Ready! To prepare for Lesson 2-1, do Exercise 69.

See p. 829.

69. 1. Copy and extend this list to show the first 10 perfect squares.

       1 2 = 1 , 2 2 = 4 , 3 2 = 9 , 4 2 = 16 , … 1 squared , equals 1 comma , 2 squared , equals 4 comma , 3 squared , equals 9 comma , 4 squared , equals 16 comma dot dot dot

    2. Which do you think describes the square of any odd number?

       It is odd.

       It is even.

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