Questions

For problems #1 through #8, identify the circle part named by the letters.

1) Segment AE

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2) Segment BD

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3) Segment FD

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4) Segment FC

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5) Segment FB

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6) Angle DFC

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7) Angle CFB

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8) Point F

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Find three circular objects in your home, all different sized circles. Use a ruler to measure the diameter in centimeters to the nearest tenth of a centimeter (eg. 5.1 cm). Use a string or yarn to wrap around the circle, then extend it out in a straight line and measure the length in centimeters to the nearest tenth. When you do this, you are measuring the circumference (distance around the circle). Use a string that doesn’t stretch easily for better results. Print out the chart and record the results. Measure to find the circumference and diameter. Divide to find C ÷ d. You may use a calculator to divide. Use the data you gathered and computed to answers questions #9 through #12.

For the first item in the table, what is the name of the item measured, its circumference, its diameter, and the results for C ÷ d ?

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10)

For the second item in the table, what is the name of the item measured, its circumference, its diameter, and the results for C ÷ d ?

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11)

For the third item in the table, what is the name of the item measured, its circumference, its diameter, and the results for C ÷ d ?

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12)

Solve.

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13) Find the radius of a circle if its diameter is 12 inches.

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14) Find the diameter of a circle if its radius is 7.5 yards.

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15) Find the circumference of a circle whose radius is 5 feet.

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16) Find the circumference of a circle whose diameter is 14 inches.

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Review

17) 7.8 cm = _____________mm

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18) If segment CD is congruent to segment XY, what is true about the two segments?

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19) 9.3 l = ______________ml

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20) 6500 mg = ______________ g

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21) Cynthia is in Europe and wants to purchase a gallon of milk. However, in Europe, the system of measurement is metric. Choose which expression is closest to a gallon of milk.

a.) 4 ml

b.) 4 m

c.) 4 l

d.) 4 mg

22) While in Europe, Cynthia decides to rent a car and travel to the next largest city. Choose the expression that is closest to speed limit she may encounter on her trip.

a.) 96 cm per hour

b.) 96 m per hour

c.) 96 km per hour

d.) 96 dm per hour

23) Find the perimeter of a rectangle whose length is 12 feet and its width is 15 feet. Label correctly.

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24) Find the area of a rectangle whose length is 12 feet and its width is 15 feet. Label correctly.

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25) What is the measure of the red angle? What type of angle is it?

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