A round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center)
A circle
How do you find the radius of a circle when given the diameter?
divide the diameter by 2
How do you find the diameter of a circle when given the radius?
multiply the radius times 2
What is the formula for finding the circumference of a circle?
What is the formula for finding area of a circle?
A straight line from the center to the circumference of a circle
Radius
What is the radius of a circle that has an 8-foot diameter?
4 ft.
What is the diameter of a circle with a radius of 5 inches?
10 inches
Find the circumference of this circle when pi=3
84 m.
Find the area of this circle when pi = 3
588 m.
A straight line passing from side to side through the center of a circle
Diameter
What is the radius of this circle?
6 cm.
What is the diameter of a circle with a radius of 100 feet?
200 ft.
What is the circumference of a circle with a radius of 6 inches when pi = 3.14?
37.68 inches
What is the area of a circle with a radius of 5.5 inches when pi = 3.14?
94.985 inches
the distance around the circle. It is the circle's perimeter
circumference
What is the radius of this circle?
3.1 mm
What is the diameter of this circle?
28 m
What is the circumference of this circle when pi = 3.14?
28.26 in.
What is the area of this circle when pi = 3.14?
28.26 in.
The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle or circle
Area
What is the radius of a circle that has a 325-foot diameter?
162.5 ft.
What is the diameter of a circle with a radius of 215 inches?
430 in.
What is the circumference of this circle when pi = 3.14?
19.468 mm
What is the area of this circle when pi = 3.14?
30.1754 mm
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