4. Name and draw 5 regular polygons.


5. a) Match the triangle to its description. 3 equal sides


3 equal angles of 60°


2 equal sides 2 equal angles


No equal sides No equal angles


b) Now match the triangle to its correct name. equilateral triangle


isosceles triangle


6. What shape am I? a) I have 6 sides. b) I have as many sides as an ant has legs. c) I have 4 sides of equal length. d) I have 3 sides, none of which are the same length. e) I have as many sides as you have toes on one foot. f) I have 4 sides. Only one pair of sides are parallel. g) Draw an example of each of the above shapes.


Puzzler


Inspector Pentagon walked into the drawing room of Shape Hall to fi nd the maid, Ms Circle, lying dead on the fl oor. All of the suspects for the murder were present: Lord Rectangle, Lady Rhombus, Sir Square, Prince Parallelogram and media mogul Terence Triangle. Inspector Pentagon took one look around the room and announced that he knew who was guilty of the terrible crime. ‘The person who is responsible for this infamous act has 4 sides,’ he announced. Terence Triangle heaved a sigh of relief. The inspector directed the 2 policemen who were with him to arrest the person whose opposite sides were equal, whose opposite sides were parallel, who had 4 right angles and who was a regular kind of a chap. The policemen scratched their heads and looked at each other in bewilderment. They did not know who to arrest. Can you follow all of the clues and help them to identify the guilty person?


scalene triangle


2-D Shapes 1


67


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