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