Circle Geometry Quiz

Which part of a circle is defined as the distance around the outside of the circle?

• Radius

• Diameter

• Circumference

• Arc

What is the term for a straight line that goes from one side of a circle to the other, passing through the centre?

• Radius

• Diameter

• Arc

• Circumference

If the radius of a circle is 5 cm, what is the diameter?

• 5 cm

• 10 cm

• 15 cm

• 20 cm

Which of the following is the plural form of "radius"?

• Radii

• Radiuses

• Radius

• Radials

What is the name of the point that is equidistant from all points on the circle?

• Circumference

• Centre

• Arc

• Radius

Which part of a circle is a straight line from the centre to any point on the edge of the circle?

• Diameter

• Radius

• Arc

• Circumference

What is the term for half of a circle?

• Quarter circle

• Semicircle

• Arc

• Diameter

If a circle has a diameter of 12 cm, what is the radius?

• 3 cm

• 6 cm

• 12 cm

• 24 cm

Which of the following is a part of the outline or curve of a circle?

• Centre

• Arc

• Diameter

• Radius

What is one-fourth of a full circle called?

• Semicircle

• Quarter circle

• Arc

• Radius