Drawing 3D shapes

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Intros
Lessons
  1. Introduction to Drawing 3D Shapes:
  2. How to draw 3D shapes by hand
  3. What is the net of a 3D shape?
  4. How to draw a net for: prisms, pyramids, and curved surface shapes
  5. How to draw 2D perspectives of 3D shapes
  6. What is the cross section of a 3D shape?
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Examples
Lessons
  1. Drawing Nets for 3D shapes
    Draw the net of the 3D shape.
    1. Rectangular prism 3D Shapes and Volume: Drawing 3D Shapes
    2. Triangular prism 3D Shapes and Volume: Drawing 3D Shapes
    3. Cylinder 3D Shapes and Volume: Drawing 3D Shapes
    4. Rectangular pyramid 3D Shapes and Volume: Drawing 3D Shapes
  2. Identifying 3D Shapes from Their Net
    What would the figure made by this net look like? What is this 3D shape called?

    1. 3D Shapes and Volume: Drawing 3D Shapes

    2. 3D Shapes and Volume: Drawing 3D Shapes

    3. 3D Shapes and Volume: Drawing 3D Shapes
  3. 2D Views of 3D Shapes
    Based on the 3D shape give, draw the 2D view from the top, side, and the front.

    1. 3D Shapes and Volume: Drawing 3D Shapes

    2. 3D Shapes and Volume: Drawing 3D Shapes

    3. 3D Shapes and Volume: Drawing 3D Shapes
  4. Cross Sections of 3D Shapes
    Draw the cross section given by each blue plane intersecting the 3D shape given.

    1. 3D Shapes and Volume: Drawing 3D Shapes

    2. 3D Shapes and Volume: Drawing 3D Shapes

    3. 3D Shapes and Volume: Drawing 3D Shapes

    4. 3D Shapes and Volume: Drawing 3D Shapes
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Topic Notes
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  • How to draw 3D shapes by hand
  • That the β€œnet” of a 3D shape is what it looks like when it is unfolded to show all faces flat in 2D
  • How to draw a net for prisms, pyramids, and curved surface shapes
  • How to draw 2D perspectives of 3D shapes (top view, side view, front view)
  • How to find the cross section of a 3D shape

Notes:

  • A net is the 2D pattern that shows all the faces of a 3D shape as if it is unfolded
    • Think about what happens when a 3D shape is flattened
    • When drawing the net of 3D shapes, start with drawing the base as the 2D shape in your net, then continue adding faces that are connected to each other at different edges as 2D shapes in your net
  • To draw the net of a prism:
    • Recall that for a prism:
      • the number of faces (f) is two more than the number of sides in the base (b); f=b+2f = b + 2
      • all the faces (besides the pair of bases) are rectangles
    • Ex. the number of faces in a cube is 6 (square base, therefore: f=4+2f=4+2 )

3D Shapes and Volume: Drawing 3D Shapes

  • To draw the net of a pyramid:
    • Recall that for a pyramid:
      • the number of faces (f) is one more than the number of sides in the base (b);f=b+1 f = b + 1
      • all the faces (besides the single base at the bottom) are triangles
    • Ex. the number of faces in a rectangular pyramid is 5 (rectangle base: f=4+1f = 4+1)

3D Shapes and Volume: Drawing 3D Shapes

  • To draw the net of a cylinder :

3D Shapes and Volume: Drawing 3D Shapes

  • To draw the net of a cone:

3D Shapes and Volume: Drawing 3D Shapes

  • For 2D perspectives of 3D shapes, draw the 2D faces that only can be seen when viewing the 3D shape from the: top view , side view, or front view.

3D Shapes and Volume: Drawing 3D Shapes

  • The cross section of a 3D shapes is obtained when a flat plane intersects a 3D shape (cuts straight through it).

3D Shapes and Volume: Drawing 3D Shapes