# Shared Flashcard Set

## Details

section 10.1
Tangents to Circle
13
General Vocab
12/21/2005

Term
 Circumference
Definition
 Peremiter of the circle.Distance around edge of circle.
Term
 Cord
Definition
 Segment conneting 2 pts on the circumferece of the circle.
Term
 Congruent Circle's
Definition
Term
 Secant
Definition
 Ray or line that passes thru the circle 2 times.
Term
 Tangent
Definition
 Ray or line that touches the circle at exactly 1pt, but never enters the circle.
Term
 Point of Tangency
Definition
 Point where tangent touches the circle.
Term
 Interior of Circle
Definition
 Inside the circle. The line around the circle (circumference) doesn't count.
Term
 Enterior of Circle
Definition
 Out side of the circle. The line around the circle (circumference) counts as exterior.
Term
 Concetrec Circle's
Definition
 Circles with the same center point.
Term
 Tangent to a Circle
Definition
 a. Common enternal tangents where tangents just touch on top of both circles or on the bottom of both.b. common internal tangents where tangents touch on top of one and bottom of other or right and left.
Term
 Circle's Tangent to each other
Definition
 a. Externally tangent where no interior of circle touch and it just touches on one point on exterior.b.Internallly tangent where one circle is inside the other and there exteriors touch.
Term
 Thm.
Definition
 If a line is tangent to a circle then it is perpaendicular to the radius drawn to the point of tangency.
Term
 Thm.
Definition
 If 2 segments from the same exterior point are tangent to a circle then they are congruent.
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