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Lesson #45 Naming Polygons

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By Ian Graven Of 803

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These are all polygons. A polygon is a 3 or more straight-sided figure

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These are not polygons These all have at least 1 rounded side.

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**Here are some special polygons.**

rectangle square A rectangle is a square which the 4 sides are not the same. A square has 4 sides and angles that are the same.

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**Rhombus parallelograms**

A rhombus is a square tilted. That means that all the sides are the same but the angles are not the same. A parallelogram is a rectangle tilted. That means that 2 sides are the same and the other 2 are the same but they all have different angles.Opposite sides are parallel.

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**Trapezoid Dart A dart is a 4 sided figure in the shape of a arrowhead.**

A 4 sided figure with a set of parallel bases.

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Kite A kite is a figure with one line of symmetry.

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**There are many types of polygons **

The way you find out the type of a polygon is by counting the number of sides A 3 sided polygon is called a triangle

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**A 4 sided polygon is called a quadrilateral**

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**A 5 sided polygon is called a pentagon**

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**A 6 sided polygon is called a hexagon**

A 7 sided polygon is called a heptagon

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**Then there is an octagon which has 8 sides**

Nonagon = 9 sides Decagon = 10 sides

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**Here is a review of the polygons**

Triangle 3 Quadrilateral 4 Pentagon 5 Hexagon 6 Heptagon 7 Octagon 8 Nonagon 9 Decagon 10

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**Here are some example questions**

Name this shape

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**The answer is a pentagon because this shape has five sides**

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**Or the question could be**

What is the name of the polygon with 5 sides

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**The answer is pentagon because a pentagon has 5 sides**

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And now… 10 Practice Questions

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Question # 1 Name this shape. A: quadrilateral B: triangle C: octagon

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**Question # 2 Which figure has 7 sides? A: heptagon B: hexagon**

C: octagon

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**Question # 3 Which figure has 9 sides? A: decagon B: pentagon**

C: nonagon

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Question # 4 Name this shape. A: quadrilateral B: hexagon C: pentagon

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Question # 5 Name this shape. A: heptagon B: hexagon C: octagon

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**Question # 6 What figure has 8 sides? A: decagon B: octagon**

C: heptagon

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Question # 7 Name this shape. A: hexagon B: heptagon C: octagon

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**Question # 8 What figure has 3 sides? A: quadrilateral B: triangle**

C: nonagon

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**Question # 9 What figure has 6 sides?**

A: pentagon B: hexagon C: heptagon

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Question # 10 Name this shape. A: nonagon B: decagon C: octagon

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And Now.. The Answers Prepare Yourself !

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**Question # 1 Name this shape. A: quadrilateral B: triangle C: octagon**

The answer is A

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**Question # 2 Which figure has 7 sides? A: heptagon B: hexagon**

C: octagon The answer is A

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**Question # 3 Which figure has 9 sides? A: decagon B: pentagon**

C: nonagon The answer is C

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**Question # 4 Name this shape. A: quadrilateral B: hexagon C: pentagon**

The answer is C

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**Question # 5 Name this shape A: heptagon B: hexagon C: octagon**

The answer is C

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**Question # 6 What figure has 8 sides? The answer is B A: decagon**

B: octagon C: heptagon

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**Question # 7 Name this shape. A: hexagon B: heptagon C: octagon**

The answer is B

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**Question # 8 What figure has 3 sides? A: quadrilateral B: triangle**

C: nonagon The answer is B

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**Question # 9 What figure has 6 sides?**

A: pentagon B: hexagon C: heptagon The answer is B

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**Question # 10 Name this shape. The answer is A A: nonagon B: decagon**

C: octagon

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The End

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