Geometry

1234567
Across
  1. 2. a portion of circumference
  2. 4. half of the Diameter
  3. 6. half of a semicircle
  4. 7. equidistant from whole circumference
Down
  1. 1. joins two points on the circle
  2. 3. divides the circle into 2 equal half
  3. 5. line passing and intersecting circumference