3D Shapes for Beginners

Hi,I am going to show you how to make really easy 3D shapes.
materials need
1.pencil or pen
2,paper
these are what the finished drawings look like

1.Draw A Square
2.Make A Diagonal Line On Top
3.Draw A Straight Line Connected To That One
4.Draw Another Diagonal Line Connecting To The Square

1.Draw A Circle
2.Draw A Curved Line From The Top Of The Circle To The Bottom

1.Draw A Triangle
2.Draw A Line At The Top Of The Triangle
3.Connect The Top Of The Line To The Bottom Points Of The Triangle