Vocabulary
Name the collection of points equidistant from a point called the center
Circle
What is the approximate circumference of a circle if:
the diameter = 14 yds?
43.96 yd
What is the exact area of a circle if:
the radius is 4 inches?
16 pi sq in
What is the radius of a circle that has a diameter of 50 inches?
25 inches
Name the line segment that touches both sides of the circle and goes through the center.
Diameter
What is the exact circumference of a circle that has a diameter of 13 inches?
13 pi in
What is the exact area of a circle if the diameter is 14 meters?
49 pi sq meters
What is the diameter of a circle that has a radius of 14 inches?
28 inches
What do you call half of the diameter?
radius
What is the estimated circumference of a circle if:
the radius is 8 inches?
50.24 in
What is the estimated area if the radius is 9 inches?
254.34 sq in
What is the radius if the circumference is 37.68 inches?
6 in
The measurement of the circle that goes around the entire circle.
Circumference
What is the exact circumference of a circle if:
the radius is 10 cm?
20pi cm
What is the approximate area of a circle if:
the diameter = 14 yds?
153.86 sq yards
What is the diameter of a circle if the area is 78.5 cm?
10 cm
The measurement of the space inside of a circle.
Area
What is the exact circumference of a circle if:
the radius = 5.9 yds?
11.8pi yds
What is the approximate area of a circle that has a circumference of 16 pi inches?
200.96 sq. in.
What is the diameter of a circle that has an area of 36 pi sq. in?
12 inches