Circle Review B

Front

What is the definition of a tangent line to a circle?

Back

A tangent line to a circle is a straight line that touches the circle at exactly one point, called the point of tangency.

Front

What is the formula for the equation of a circle in standard form?

Back

Front

How do you find the center and radius from the equation of a circle?

Back

Front

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

Back

Front

What is the measure of an angle formed by two tangents drawn from a point outside the circle?

Back

The measure of the angle formed by two tangents drawn from a point outside the circle is equal to half the difference of the measures of the intercepted arcs.

Front

What is the significance of the point of tangency in circle geometry?

Back

The point of tangency is significant because it is the only point where the tangent line touches the circle, and at this point, the radius is perpendicular to the tangent.

Front

How do you determine if a line segment is tangent to a circle?

Back

A line segment is tangent to a circle if it meets the circle at exactly one point and is perpendicular to the radius at that point.

Front

What is the formula for the area of a circle?

Back

Front

What is the circumference of a circle?

Back

Front

How do you find the value of x in tangent-segment problems?

Back

In tangent-segment problems, use the property that the lengths of the tangent segments from a point outside the circle are equal.