Geom: Circle Parts

Front

What is the definition of a radius in a circle?

Back

A radius is a line segment that connects the center of the circle to any point on its 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 a central angle in a circle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii that extend to the circumference.

Front

What is a secant line in relation to a circle?

Back

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

Front

What is the relationship between a radius and a diameter?

Back

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

Front

How do you calculate the circumference of a circle?

Back

The circumference can be calculated using the formula C = 2πr, where r is the radius.

Front

What is the area of a circle?

Back

The area of a circle is calculated using the formula A = πr², where r is the radius.

Front

What is the difference between a chord and a diameter?

Back

A diameter is a specific type of chord that passes through the center of the circle, while a chord does not necessarily pass through the center.

Front

What is the definition of an arc in a circle?

Back

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

Front

What is the relationship between the central angle and the arc it subtends?

Back

The measure of the arc is equal to the measure of the central angle that subtends it.