Match the following vocabulary 1. the distance around a circle radius 2. a portion of the circumference of a circle minor arc 3. the distance from the center to any point on a circle circumference 4. the distance through the center between points on a circle arc measure 5. the degree measurement of an arc (in reference to its central angle) semicircle 6. an arc which measures less than 180° diameter 7. an arc which measures exactly 180° arc length