LNCI MATH EXERCISE

In the formula 2πr, what is the result of this?

• Circumference

• Area

• Perimeter

• Volume

Congruent circles are two or more circles that have congruent diameter

• TRUE

• FALSE

It is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.

• Rectangle

• Pentagon

• Circle

• Triangle

Concentric circles are coplanar circles that have a common center.

• TRUE

• FALSE

A ______ is a line (or segment or ray) that intersects a circle at exactly two points

It intersects only with one (1) point in the circle

• Sine

• Secant

• Tangent

• Cotangent

A central angle of a circle is an angle whose _____ is the center of the circle and whose sides are radii of the circle.

A polygon is circumscribed about a circle if all sides of the polygon are line segments tangent to the circle

• TRUE

• FALSE

Identify what is the shaded region is called . . .

• Minor Segment

• Half-Circle

• Secant

• Major Segment

A line segment that joins two points of a circle is a _____ of a circle.