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