Identify the 3D shape

What am I number look at picture 1

What am I number look at picture 2

What am I number look at picture 3

What am I number look at picture 4

What am I number look at picture 5

What am I number look at picture 6

look me picture 3 if I were halved what would I be

Picture 1 - am I a 2D OR 3D shape ?

Picture 2 - am I a 2D OR 3D shape ?

Picture 3 - am I a 2D OR 3D shape ?