Unit 10 math test- VOCAB
Center
equal distance from all points on the circle's perimeter
radius
segment with endpoints at the center and on the circle
Chord
segment with endpoints on the circle
diameter
chord that passes through the center
Concentric circles
coplanar circles that have the same center but have different diameters
Circumference
distance around the circle
Circumscribed
outside
inscribed
inside
central angle
angle with it's vertex on the center
arc
portion of a circle defined by two endpoints
minor arc
shortest arc connecting two endpoints on a circle
major arc
longest arc connecting two endpoints on a circle
semicircle
arc where both endpoints lie on a diameter
congruent arcs
arcs in the same circle or in congruent circles that have the same measure
Adjacent arcs
arcs in a circle that have exactly one point in common
Arc length
the distance between the endpoints along an arc measured in linear units (fraction of the circumference
inscribed angle
vertex is on the circle and the angle opens up towards the center
intercepted arc
the arc that is inside the inscribed angle and whose endpoints are on the angle
Tangent
a line outside the circle that intercepts the circle at only one point
Point of tangency
the point where the tangent line touches the circle
common tangent
a line, ray, or segment that is tangent to two circles in the same plane
Secant
a line that intersects a circle in exactly two points
Chord segment
when two chords intersect inside a circle and is divided into two segments
Secant segment
a segment of a secant line that has exactly one endpoint on the circle
external secant segment
secant segment that lies in the exterior of the circle
tangent segment
segment of a tangent with one endpoint on the circle