Last Vocab Flashcards
Ratio of length of two legs of a right triangle
Trigonometric Ratio
Tan = Opp. / Adj.
Tangent
Cos = Adj. / Hyp.
Cosine
Sin = Opp. / Hyp.
Sine
Arcs that have the same measure
Similar Arcs
Arcs that have the same measures and are of the same circle or of congruent circles
Congruent Arcs
Circles that can be mapped onto each other by a rigid motion or composition of rigid motions
Congruent Circles
Arc’s of a circle that have exactly 1 point in common
Adjacent Arcs
Arc w/ endpoints that are endpoints of a diameter
Semicircle
Arc w/ a measure greater than 180°
Major Arc
Arc w/ a measure less than 180°
Minor Arc
Angle whose vertex is the center of a circle
Central Angle
Liner or segment that is a tangent to 2 coplanar circles
Common Tangent
Coplanar circles that have a common center
Concentric Circles
Coplanar circles that intersect in 1 point
Tangent Circles
Point at which a tangent line intersects a circle
Point of Tangency
Line in plane of a circle that intersects circle at exactly 1 point
Tangent
Line that intersects a circle at 2 points
Secant
Chord that contains the center of a circle
Diameter
Segment whose endpoints are on a circle
Chord
Segment whose endpoints are center and any point on circle
Radius
Point from which all points on a circle are equidistant
Center
Set of all points in a place that are equidistant from a given point
Circle
A portion of the circumference of the circle
Arc
