Circle Review

Front

What is a semi-circle?

Back

A semi-circle is half of a circle, formed by cutting a whole circle along its diameter.

Front

What is the diameter of a circle?

Back

The diameter is a straight line that passes through the center of the circle, connecting two points on its circumference. It is twice the length of the radius.

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle. It does not necessarily pass through the center.

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

What is an inscribed angle?

Back

An inscribed angle is formed by two chords in a circle which share an endpoint. The vertex of the angle is on the circle.

Front

What is a sector of a circle?

Back

A sector is a portion of a circle enclosed by two radii and the arc between them.

Front

What is a tangent to a circle?

Back

A tangent is a straight line that touches the circle at exactly one point and does not cross into the circle.

Front

What is the relationship between the radius and diameter?

Back

The diameter is twice the length of the radius (Diameter = 2 x Radius).

Front

What is the circumference of a circle?

Back

The circumference is the distance around the circle, calculated as C = π x Diameter or C = 2π x Radius.

Front

What is a secant line?

Back

A secant line is a line that intersects a circle at two points.