I have 6 flat faces, 12 edges, and 8 corners. All my edges are the same. What am I?

I have 4 sides that are all the same length and 4 right angles. What am I?

I have 1 flat surface and 1 curved surface. My flat face is circular. My curved surface makes a sharp point. I don't have sides. I look like a party hat. What am I?

I am a solid 3D that is like a box that has been cut in half diagonally along one face. What am I?

I have 5 flat surfaces. my base is a square. The other 4 surfaces are triangles that make a sharp point. What am I?

I am a solid 3D that is perfectly round. I don't have flat faces and I don't have straight edges. What am I?

I am a solid geometric figure with straight parallel sides and a circular or oval cross-section. What am I?

I have 6 flat faces, 12 edges, and 8 corners. All my edges are the same. What am I?

I am a solid 3D that is like a donut shape. I don't have flat faces and I don't have straight edges. What am I?