Exploring Circle Properties

What is the definition of a circle?

• A circle is the set of all points in a plane that are equidistant from a fixed point called the center.

• A circle is a straight line that connects two points.

• A circle is a shape with corners and edges.

• A circle is a polygon with three sides.

What is the center of a circle?

• The center of a circle is the area where the radius meets the diameter.

• The center of a circle is the point where all lines intersect.

• The center of a circle is the outer edge of the circle.

• The center of a circle is the point equidistant from all points on its circumference.

What is the radius of a circle?

• The radius of a circle is half the diameter.

• The radius is the distance from the center to the edge of a square.

• The radius is equal to the diameter.

• The radius is twice the circumference.

What is the diameter of a circle?

• The diameter is equal to the area of the circle.

• The diameter is the distance from the center to the edge of the circle.

• The diameter is twice the radius of the circle.

• The diameter is half the circumference of the circle.

How is the circumference of a circle calculated?

• C = πd

• C = 4r

• C = r²π

• C = 2πr

What is the formula for the area of a circle?

• A = πd

• A = πr²

• A = r²/2

• A = 2πr

What is the relationship between the radius and diameter?

• The diameter is half the radius.

• The radius is twice the diameter.

• The diameter is twice the radius.

• The radius and diameter are equal.

What do we call a line segment that touches a circle at one point?

• Chord

• Diameter

• Tangent

• Secant

What is a chord in a circle?

• A chord is a diameter of the circle.

• A chord is a line segment with both endpoints on the circle.

• A chord is a line segment that extends outside the circle.

• A chord is a line that touches the circle at one point.

What is the term for the distance around a circle?

• Circumference

• Area

• Radius

• Diameter