Parts of the Circle Crossword

the outer boundary, especially of a circular area; perimeter
a straight line extending from the center of a circle or sphere to the circumference or surface
a plane figure bounded by two radii and the included arc of a circle.
half of a circle; the arc from one end of a diameter to the other.
any particular extent of space or surface; part
touching at a single point, as a tangent in relation to a curve or surface.
the line segment between two points on a given curve.
a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end.
an intersecting line, especially one intersecting a curve at two or more points
is an arc of a circle having measure greater than or equal to 180 degrees
in a circle determines an arc
is an arc of a circle having measure less than or equal to ( radians)
is an angle formed by two chords in a circle which have a common endpoint