Geometry

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Across
  1. 3. Polygon with four edges and four vertices
  2. 4. The common endpoint at which the two rays meet to form an angle
  3. 6. Plane figure with at least three straight sides and angles
  4. 8. A three-dimensional shape with identical ends, called bases, and flat sides called faces
  5. 9. The measurement of the length, width, and height of anything.
Down
  1. 1. Quadrilateral with two pairs of parallel sides
  2. 2. Three-sided polygon
  3. 5. Has one endpoint and the other point is like a line extending indefinitely
  4. 6. Exact position or location on a plane surface
  5. 7. An infinite set of points with two endpoints
  6. 8. Flat, two-dimensional surface that extends infinitely far.