Mathematics W2 Flashcards
An angle whose vertex is at the center of a circle.
Central Angle
An angle in a circle which vertex is on the circle and which sides contain chords of the circle.
Inscribed Angle
A part of a circle that consists of two points on a circle and all points needed to connect the points by a single path.
Arc
An arc whose endpoints of a diameter.
Semicircle
An arc whose points are on or outside of a central angle.
Major Arc
The measure of the central angle of a
circle is equal to the measure of its intercepted arc.
CA-IA Postulate (Central Angle – Intercepted Arc Postulate)
The measure of the arc formed by two adjacent arcs is the sum of the measures of the two arcs.
Postulate 23 (The Arc Addition Postulate)
A diameter divides a circle into two semicircles.
Postulate 24
The length of an arc of a circle is the product of the ratio,
Theorem 96: ARC LENGTH
