Area of a Cirlce
Circumference of a Circle
Area of a Sector
Arc Length
Equation of a Circle
100
What is the area of a circle given the diameter is 16π?
64π3 = 1984.4
100
Find the perimeter of the semicircle
15π+30 = 77.123
100
What is the area of the whole circle given the area of the sector is 24 and the central angle is 87 degrees?
99.31
100
The circle with central angle at 35 degrees has a circumference of 16. What is the length of arc AC?
1.56
100
The equation
x^2+(y-2)^2=36
represents circle A. Circle B is obtained by shifting circle A down 4 units in the xy-plane.
x^2+(y+2)^2=36
200
Find the error. What is the correct area of the circle?
36π = 113.097
200
The diameter of the new roll of caution tape decreases 3.25 inches after a construction worker uses some of the tape.What is the best estimate of the circumference of the roll after the decrease? 
21.195 inches
200
A circle is split into 9 equal sections, with a radius of 5 what is the area of one section?
8.726
200
Find the length of PQ
1.875π = 5.8905
200
A circle in the xy-plane has its center at ( -4 , 5 ) and the point ( -8 , 8 ) lies on the circle. What is the equation of the circle?
(x + 4)^2+(y-5)^2=25
300
A pint of paint covers 15 inches squared. Gianna is in the middle of painting a mural for A House. She needs to paint in the circle. She has calculated that the diameter of the circle needs to be 26 inches long. How many pints of paint should she get?
35.39 to be exact or 36 pints
300
A circle has center O , and points A and B lie on the circle. The measure of the central angle is 45 degrees and the length of arc AB is inches 3. What is the circumference, in inches, of the circle?
24 inches
300
Find the area of the shaded circle
33.51
300
A semicircle has endpoints (−2, 5) and (2, 8). Find the arc length of the semicircle.
7.85
300
Does the point (-5, -8.5) lie on the circle with the center at ( - 5, - 2) with the diameter of the circle measuring 42.25
Yes, the radius is the same as the distance between the point
400
The circumference of a circle is aπ and the area of the circle is bπ square units. If a = b, what is the radius of the circle?
r = 2
400
A baker uses a coffee mug with a diameter of 8 cm to cut out circular cookies from a big sheet of cookie dough. They need to keep the cookies need to be 1 inch apart (2.54 cm) and from the sides of the sheet. The sheet is 45 x 35 cm long. How many cookies can fit on a sheet?
12 cookies
400
A rectangular wall has an entrance cut into it. You want to paint the wall. What is the area of the region you need to paint?
579.469 ft squared
400
A measuring wheel is used to calculate the length of a path. The diameter of the wheel is 8 inches. The wheel makes 87 complete revolutions along the length of the path. To the nearest foot, how long is the path?
182.21 ft
400
Which of the following equations represents a circle in the xy-plane that intersects the y-axis at exactly one point?
C
500
If the total price of 6 small silver-dollar pancakes is the same as the total price of 3 regular-size pancakes, which is the better deal and by how much (as a percent) ?
3 regular size by 1.469%
500
The length of the minute hand is 150% of the length of the hour hand. In 1 hour, how much farther does the tip of the minute hand move than the tip of the hour hand?
102π = 320.28
500
Find the area of the shaded region
145.636 cm squared
500
A car tire has a diameter of 28 inches. How many revolutions does the tire make while traveling 500 feet?
68.209 revolutions
500
( 2 , - 5)