Circles TEST Acc Geo 24 25

Front

What is a tangent to a circle?

Back

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

Front

What is the measure of a semicircle?

Back

The measure of a semicircle is 180 degrees.

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 formula for calculating the arc length of a circle?

Back

Arc Length = (θ/360) * 2πr, where θ is the angle in degrees and r is the radius.

Front

What does it mean for two circles to be tangent?

Back

Two circles are tangent if they touch at exactly one point.

Front

What is the relationship between the radius and diameter of a circle?

Back

The diameter is twice the length of the radius (D = 2r).

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the difference between a secant and a chord?

Back

A secant is a line that intersects the circle at two points, while a chord is a segment with both endpoints on the circle.

Front

What is the central angle of a circle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides intersect the circle.

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.