Relier Pairs Geometry part 1 of circle unit vocabVersion en ligne study geometery circle vocab par Hannah Schmidt 1 Chord 2 Central angles 3 Point of tangency 4 Radius 5 Tangent 6 Diameter 7 Inscribed angle 8 Secant segment connecting 2 points on the circumference and through the center a line perpendicular to a radius and only touches the circumference once 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 Segment connecting center to circumference 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 line intersecting a circle twice