Circle Terms
The distance across the center of a circle from one side to the other
What is the diameter?
The formula that shows the relationship between diameter and radius starting with d =
What is d = 2r?
The diameter of a circle if the radius is 5 units
What is 10 units?
The diameter for this circle is 10 cm
What is 31.4 cm?
The radius of this circle is 1 unit
What is 3.14 unit2?
The distance from the center of a circle to the outside, also half of the diameter
What is radius?
The formula that shows the relationship between radius and diameter starting with r =
What is r = 1/2 d?
The diameter of a circle if the radius is 2.5 m
What is 5 m?
The diameter for this circle is 4 in
What is 12.56 in?
The radius of this circle is 3 ft
What is 28.26 ft2?
The distance around the outside of a circle
What is the circumference?
The formula for finding the circumference of a circle when given the diameter
What is c = d • pi?
The radius of a circle if the diameter is 12 in
What is 6 in?
The diameter of this circle is 25 units
What is 78.5 units?
The radius of this circle is 8 in
What is 200.96 in2?
The total amount of space inside of a circle
What is the area?
The formula for finding the circumference of a circle when given the radius
What is c = 2r • pi?
The radius of a circle if the diameter is 437 km
What is 218.5 km?
The radius for this circle is 8 ft
What is 50.24 ft?
The diameter of this circle is 2 cm
What is 3.14 cm2?
The relationship between the circumference and the diameter - in other words the number of diameters that fit around the circumference
What is pi?
The formula for finding the area of a circle when given the radius
What is a = r2 • pi?
The diameter of a circle if the circumference is 15.7 in
What is 5 in?
The radius for this circle is 45 miles
What is 282.6 miles?
The diameter of this circle is 4 units
What is 6.28 units2?