Standardized Test Prep

SAT/ACT

40. The diameter of a circle is 25 cm and a chord of the same circle is 16 cm. To the nearest tenth, what is the distance of the chord from the center of the circle?
    1. 9.0 cm
    2. 9.6 cm
    3. 18.0 cm
    4. 19.2 cm
41. The Smart Ball Company makes plastic balls for small children. The diameter of a ball is 8 cm. The cost for creating a ball is 2 cents per square centimeter. Which value is the most reasonable estimate for the cost of making 1000 balls?
    6. $2010
    7. $16,080
    8. $4021
    9. $42,900
42. From the top of a building you look down at an object on the ground. Your eyes are 50 ft above the ground and the angle of depression is 50 ° . 50 degrees .  Which distance is the best estimate of how far the object is from the base of the building?
    1. 42 ft
    2. 60 ft
    3. 65 ft
    4. 78 ft

Short Response

43. A bicycle tire has a diameter of 17 in. How many revolutions of the tire are necessary to travel 800 ft? Show your work.

Mixed Review

See Lesson 12-1.

Assume that the lines that appear to be tangent are tangent. O is the center of each circle. Find the value of x to the nearest tenth.

See Lesson 7-5.

46. The legs of a right triangle are 10 in. and 24 in. long. The bisector of the right angle cuts the hypotenuse into two segments. What is the length of each segment, rounded to the nearest tenth?

See Lesson 10-6.

Get Ready! To prepare for Lesson 12-3, do Exercises 47–52.

Identify the following in ⊙ P circle dot p  below.

47. a semicircle
48. a minor arc
49. a major arc

Find the measure of each arc in ⊙ P . circle dot p .

51. S T ⌢ modified s t with frown above
52. S T Q ⌢ modified s t q with frown above
53. R T ⌢ modified r t with frown above

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