Matching Pairs Geometry part 1 of circle unit vocabOnline version study geometery circle vocab by Hannah Schmidt 1 Point of tangency 2 Chord 3 Inscribed angle 4 Diameter 5 Secant 6 Tangent 7 Central angles 8 Radius angle whose vertex is on the circumference of the circle - The measure of an inscribed angle is HALF of the intercepted arc the location where the tangent line touches the circumference line intersecting a circle twice segment connecting any 2 points on the circumference a line perpendicular to a radius and only touches the circumference once segment connecting 2 points on the circumference and through the center angle whose vertex IS the center of the circle -the measure of a circle is EQUAL to the measures of the intercepted arc Segment connecting center to circumference