Tangent of Circle Practice

Front

If a line is perpendicular to a radius of a circle at a point on the circle, then the line is ____ to the circle.

Back

Tangent

Front

What is DE in the context of circles?

Back

Chord

Front

What is the term for a line that touches a circle at exactly one point?

Back

Tangent Line

Front

QS is a tangent to circle P. If PS is 12, what is QS?

Back

12

Front

What is the value of x if it is related to a tangent in a circle?

Back

20

Front

Define a tangent line in relation to a circle.

Back

A tangent line is a straight line that touches the circle at exactly one point and is perpendicular to the radius at that point.

Front

What is the difference between a chord and a diameter?

Back

A chord is a line segment with both endpoints on the circle, while a diameter is a special type of chord that passes through the center of the circle.

Front

What is the relationship between a tangent and a radius at the point of tangency?

Back

The tangent is perpendicular to the radius at the point of tangency.

Front

How do you find the length of a tangent from a point outside the circle?

Back

Use the Pythagorean theorem: if the distance from the center to the external point is 'd' and the radius is 'r', then the length of the tangent 't' is given by t = √(d² - r²).

Front

What is the formula for the length of a tangent segment from a point outside the circle?

Back

Length of tangent = √(distance from point to center² - radius²).