43.a Circles and Circumference

Front

What is a Chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.

Front

What is the definition of a Radius?

Back

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

Front

What is the Diameter of a circle?

Back

The diameter is a chord that passes through the center of the circle and is twice the length of the radius.

Front

What is a Tangent?

Back

A tangent is a line that touches the circle at exactly one point.

Front

What is a Secant?

Back

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

Front

What is an Arc in a circle?

Back

An arc is a portion of the circumference of a circle.

Front

What is a Sector in a circle?

Back

A sector is a region enclosed by two radii and the arc between them.

Front

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

Back

10 units (Diameter = 2 * Radius).

Front

What is the formula to find the radius from the diameter?

Back

radius = diameter / 2.

Front

What is the relationship between the radius and diameter?

Back

The diameter is always twice the radius.