Circle Terminology (More in Depth)

Circle Terminology (More in Depth)

Subjects covered:
--Chords
--Secant
--Congruent Circles
--Concentric Circles
--Central Angle
--Arc
--Major and Minor Arc
--Inscribed Angle
--Pi
--Tangent (Point of Tangency)
--Internal and External Tangent Circles
--Circumference and Area

~Chord: A segment with two end points on a circle



~Secant: A line that intersects a circle twice



Congruent Circles-- same radius, circumference, diameter


Concentric Circles-- share the same center with varying sizes


Central Angles--- The vertex of the angle is the center of the circle

Arc-- Portion of the circle's perimeter. The red portion of the circle is an example of an arc.

Major Arc--An arc equal to or larger than 180 degrees
The RED portion of the circle is the major arc.

Minor Arc--An arc less than 180 degrees.


The BLUE portion of the circle is the minor arc.

Inscribed Angle--An angle made by three points on a circle.


Central Angle--