C Challenge

49. In the diagram, Moesha, Jan, and Leandra are seated at uniform distances around a circular table. Copy the diagram. Shade the points on the table that are closer to Moesha than to Jan or Leandra.

    

Playground Equipment Think about the path of a child on each piece of playground equipment. Draw the path from (a) a top view, (b) a front view, and (c) a side view.

50. a swing
51. a straight slide
52. a corkscrew slide
53. a merry-go-round
54. a firefighters' pole

Standardized Test Prep

SAT/ACT

55. What are the coordinates of the center of the circle whose equation is ( x − 9 ) 2 + ( y + 4 ) 2 = 1 ? open x minus . 9 , close squared , plus , open y plus . 4 , close squared . equals 1 , question mark
    1. ( 3 , − 2 ) open 3 comma negative 2 close
    2. ( − 3 , 2 ) open minus , 3 comma 2 close
    3. ( − 9 , 4 ) open minus , 9 comma 4 close
    4. ( 9 , − 4 ) open 9 comma negative 4 close
56. A plane passes through two adjacent faces of a rectangular prism. The plane is perpendicular to the base of the prism. Which term is the most specific name for a figure formed by the cross section of the plane and the prism?
    6. square
    7. rectangle
    8. parallelogram
    9. kite

Short Response

57. Margie's cordless telephone can transmit up to 0.5 mi from her home. Carol's cordless telephone can transmit up to 0.25 mi from her home. Carol and Margie live 0.25 mi from each other. Can Carol's telephone work in a region that Margie's cannot? Sketch and label your diagram.

Mixed Review

See Lesson 12-5.

Write an equation of the circle with center C and radius r.

58. C ( 6 , − 10 ) , r = 5 c open 6 comma . negative 10 close comma r equals 5
59. C ( 1 , 7 ) , r = 6 c open 1 comma 7 close comma , r equals 6
60. C ( − 8 , − 1 ) , r = 13 c . open . negative 8 comma negative 1 . close . comma r equals square root of 13

See Lesson 11-2.

Find the surface area of each figure to the nearest tenth.

See Lesson 10-7.

In ⊙ O , circle dot o comma  find the area of sector AOB. Leave your answer in terms of π . pi .

63. O A = 4 , m A B ⌢ = 90 o eh equals 4 comma . m , modified eh b with frown above . equals 90
64. O A = 8 , m A B ⌢ = 72 o eh equals 8 comma . m , modified eh b with frown above . equals 72
65. O A = 10 , m A B ⌢ = 36 o eh equals 10 comma . m , modified eh b with frown above . equals 36

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