Transcript Document

A chord that goes
through the center of a
circle
diameter
A line that is tangent to more
than one circle but does not
cross between the circles
Common external tangent
A segment from the center of a circle
to any point on the circle
radius
A line that intersects a circle
in two separate points.
secant
A line that intersects a circle in
only one point
tangent
The point where a tangent
intersects a circle
Point of tangency
A line that is tangent to more
than one circle and crosses
in between the two circles.
Common internal tangent
Circle that intersect in only
one point and have no other
points in common
Externally tangent circles
Circles with the same center
but differing radii
Concentric circles
Circles that intersect in only
one point with one circle inside
of the other (sharing interior
points)
Internally tangent circles
An angle whose vertex lies
on the circle
Inscribed angle
An arc measuring less than 180°
Minor arc
An arc whose endpoints lie on a
diameter of a circle
semicircle
Find x
110°
120°
A
B
AB is a diameter
X = 70°
X = 60°