Geometry

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Across
  1. 3. I am like a cube, but my faces are rectangles, and opposite sides are not equal. I'm often used to hold books or display objects. What am I?
  2. 4. I stretch forever, never to sever.Straight and unending, what am I pretending?
  3. 5. I am the shape of slice of pizza. I have three sides and three vertices. What shape am I?
  4. 6. I have no thickness, only direction to express.A point at one end, extending to infinity with zest.What am I, in geometric conquest?
Down
  1. 1. I'm the life of the party, always spinning and twirling. My base is like a circle, and I have a single point at the top. What am I?
  2. 2. Round and round and round I go. I have no faces, no edges, no vertex you know. What is my name?
  3. 3. Open or close, big or little I have two flat faces and can roll in the middle. What am I?