1. Colour any regular pentagons blue and any irregular pentagons green. Leave anything else blank. Count each side and remember to check whether the sides are equal or unequal.


2. In your copy, draw 2 irregular pentagons.


The Pentagon is a building in the United States that is the headquarters for the US Department of Defense. It is designed in the shape of a regular pentagon.


Octagons An octagon is a closed shape with eight straight sides.


A regular octagon has eight sides of equal length and eight angles of equal size.


An irregular octagon has eight sides of unequal length and/or eight angles of unequal size.


3. Colour any regular octagons blue and any irregular octagons green. Leave anything else blank.


a) b) c) d) e) f)


4. Using a pencil and a ruler, draw 2 irregular octagons in your copy.


5. Fact or Fiction? Are the following statements Fact or Fiction? If the answer is Fiction, write the correct statement. a) A regular octagon has 8 equal sides. b) An irregular pentagon has 5 equal sides. c) An irregular octagon has 6 angles. d) A regular octagon has 8 acute angles. e) An irregular shape has all equal sides.


126 2-D Shapes


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