Geometry crossword

123456789
Across
  1. 3. a straight line going through the center of a circle
  2. 5. a rectangle with 4 equal lengths
  3. 9. a triangle with an angle of 90 degrees
Down
  1. 1. an angle greater than 90 degrees but less than 180 degrees
  2. 2. a line going from the center of a circle going to the circumference
  3. 4. a triangle which has two sides equal
  4. 6. a parallelogram having four right angles
  5. 7. line segments that cross each other
  6. 8. the line segment between two points on a given curve