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Goal:
Let's identify and describe plane shapes!


Plane shapes are usually made of sides and corners.  A vertex is the point where two sides meet.  The plural of "vertex" is "vertices."  You can describe plane shapes by the number of sides and vertices they have.


EXAMPLE

Write the number of sides and vertices.


4 sides
4 vertices



6 sides
6 vertices


Now You Try!

Match the shape with the correct sentence below.


1.  It has 3 vertices.

2.  It has 5 sides.

3.  It has 0 sides.

4.  It has 4 vertices.


Copy and complete the table.  Name each shape, and fill in how many sides and vertices each shape has.

ShapeSidesVertices
5. 

  
6.


  
7.

  
8.


  
9.


  
10.


  


11.  Ray drew this picture of a baseball diamond.


a.  What shape is it?

b.  How many sides does it have?

c.  How many vertices does it have?











Answers

1.  triangle

2.  pentagon

3.  circle

4.  trapezoid

5.  hexagon, 6, 6

6.  circle, 0, 0

7.  octagon, 8, 8

8.  triangle, 3, 3

9.  pentagon, 5, 5

10.  rectangle, 4, 4

11.  a. square  b. 4  c. 4