Circles Quiz Flashcards
(8 cards)
1
Q
Define radius
A
A segment with one endpoint at the center of a circle and the other on any point on the circle
2
Q
Define chord
A
A segment whose endpoints are both on the circle
3
Q
Define diameter
A
A chord that contains the center of the circle
4
Q
Define secant
A
A line that intersects the circle at two points
5
Q
Define tangent
A
A line that touches the circle at one point
6
Q
What are the properties of tangents? (2)
A
A tangent line is always perpendicular to the radius
External tangent lines are always congruent
7
Q
How do you determine if a line is tangent to a circle?
A
Use pythagorean theorem to determine if the triangle formed with the segment as the hypotenuse is a right triangle. If it is, then the segment is tangent to the circle
8
Q
A
