Circle Terms
The distance from the center of a circle to a point on the circle; also, half the diameter.
What is the radius?
The diameter of this circle is 5 cm.
What is 2.5 cm?
The radius of this circle is 5 mi.
What is 10 mi?
The diameter for this circle is 100 cm.
What is 100∏ cm? (also accept 314.2 cm)
The radius of this circle is 2 in.
What is 4∏ in2? (also accept 12.6 in2)
A line segment connecting two points on a circle.
What is a chord?
The diameter of this circle is 12 yd.
What is 6 yd?
The radius of this circle is 2.5 mm.
What is 5 mm?
The radius for this circle is 25 mm.
What is 50∏ mm? (also accept 157.1 mm)
The diameter of this circle is 10 ft.
What is 25∏ ft? (also accept 78.5 ft2)
The longest chord in a circle.
What is the diameter?
The circumference of this circle is 27∏ ft.
What is 13.5 ft?
The circumference of this circle is 35∏ in.
What is 35 in?
The radius of this circle is 6.5 mi.
What is 13∏ mi? (also accept 40.8 mi)
The diameter of this circle is 35 meters.
What is 962.1 m?
The total amount of space inside of a circle.
What is the area?
The area of this circle is 36∏ yd.
What is 6 yd?
The area of this circle is 16∏ meters.
What is 8 meters?
The area of this circle is 196∏ in2.
What is 28∏ in? (also accept 88.0 in)
The circumference of this circle is 18∏ cm.
What is 81∏ cm2? (also accept 254.5 cm2)
A line that intersects a circle in exactly one point.
What is a tangent line?
The area of this circle is 63.62 cm.
What is 4.5 cm?
The area of this circle is 380.13 yd.
What is 22 yd?
The area for this circle is 176.71 m2.
What is 47.1 m?
The circumference of this circle is 53.41 mm.
What is 227.0 mm2?