Grade 2 Geometry: 3D Shapes

Worked examples

Real problems from the practice worksheets, solved one step at a time.

1. Example 1

   What shape are the 2 flat faces of a cylinder?

   1. A can has a flat top and a flat bottom.
   2. Both are circles.

   Answer: circle

2. Example 2

   How many vertices does this solid have?

   1. A vertex is a corner where edges meet.
   2. Count the corners around the square bottom: 4. Then the point on top: 1.
   3. 4 + 1 = 5, so this solid has 5 vertices.

   Answer: 5

3. Example 3

   How many more vertices does a cube have than a cone?

   1. A cube has 8 vertices. A cone has 1.
   2. 8 − 1 = 7

   Answer: 7