Standardized Test Prep

SAT/ACT

51. A polyhedron has four vertices and six edges. How many faces does it have?
    1. 2
    2. 4
    3. 5
    4. 10
52. Suppose the circumcenter of Δ A B C cap delta eh b c lies on one of its sides. What type of triangle must Δ A B C cap delta eh b c be?
    6. scalene
    7. isosceles
    8. equilateral
    9. right
53. What is the area of a regular hexagon whose perimeter is 36 in.?
    1. 18 3  in . 2 18 square root of 3 . in , . squared
    2. 27 3  in . 2 27 square root of 3 . in , . squared
    3. 36 3  in . 2 36 square root of 3 . in , . squared
    4. 54 3  in . 2 54 square root of 3 . in , . squared

54. What is the best description of the polygon below?

    

    6. concave decagon
    7. concvex decagon
    8. regular pentagon
    9. regular decagon

Short Response

55. The coordinates of three vertices of a parallelogram are A(2, 1), B(1, − 2 negative 2 ) and C(4, − 1 negative 1 ). What are the coordinates of the fourth vertex D? Explain.

Mixed Review

See Lesson 10-8.

56. Probability Shuttle buses to an airport terminal leave every 20 min from a remote parking lot. Draw a geometric model and find the probability that a traveler who arrives at a random time will have to wait at least 8 min for the bus to leave the parking lot.
57. Games A dartboard is a circle with a 12-in. radius. What is the probability that you throw a dart that lands within 6 in. of the center of the dartboard?

See Lesson 8-3.

Find the value of x to the nearest tenth.

Get Ready! To prepare for Lesson 11-2, do Exercises 60–62.

See Lessons 1-8 and 10-3.

Find the area of each net.

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