Flat surfaces such as walls, desk tops, floors, and paper are planes. Planes are everywhere around you.
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A flat, closed figure that is in a plane is called a plane figure. A plane figure can be made of straight lines, curved lines, or both straight and curved lines.
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Look at the figures and click on the ones that are plane figures. Remember that a plane figure is closed and has straight or curved lines.

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Look at these figures and decide if they are made of straight lines, curved lines or both straight and curved lines.

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Some letters of the alphabet are plane figures. See if you can decide which letters are plane figures. Remember that a plane figure is a flat, closed, shape in a plane.
Click on the letters you think are plane figures.




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All of these everyday shapes are plane figures.


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Some plane figures have all straight sides and angles. The number of sides and angles will be the same.
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Look at the following figures and tell how many sides and angles each one has.
     
Sides: 
Angles: 
Sides: 
Angles: 
Sides: 
Angles: 
Sides: 
Angles: 
     
Sides: 
Angles: 
Sides: 
Angles: 
Sides: 
Angles: 
Sides: 
Angles: 

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Now let’s see if you can find out how many lines and angles are in these everyday objects. Type in the number of lines and the number of angles.
Sides: 
Angles: 
Sides: 
Angles: 
Sides: 
Angles: 

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Plane figures are flat, closed, figures that are in a plane. Look around your room for plane figures. Get a sheet of paper and draw and label 4 plane figures with 4 different shapes.

Plane figures are all around you !

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