Understanding Polygons

The video introduces polygons, which are two-dimensional closed shapes with straight lines. It explains the basic properties of polygons, including their parts: straight lines, vertices, and angles. The video categorizes polygons into types such as regular, irregular, concave, convex, simple, and complex, based on their properties. It also covers how polygons are named according to the number of sides and angles, providing examples from triangles to dodecagons. The video concludes with a brief summary and encourages viewers to explore more math videos.

What is a defining characteristic of a polygon?

• It has openings.

• It is a closed shape with straight lines.

• It is a three-dimensional shape.

• It has curved lines.

Which of the following is NOT a part of a polygon?

• Vertices

• Curves

• Angles

• Straight lines

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CCSS.2.G.A.1

What type of polygon has equal sides and angles?

• Irregular polygon

• Complex polygon

• Concave polygon

• Regular polygon

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CCSS.2.G.A.1

Which polygon has one angle greater than 180 degrees?

• Simple polygon

• Regular polygon

• Concave polygon

• Convex polygon

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CCSS.2.G.A.1

What is a simple polygon?

• A polygon with at least one line crossing over itself

• A polygon with curved lines

• A polygon with unequal sides

• A polygon with no lines crossing over

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CCSS.2.G.A.1

How many sides does a hexagon have?

• Five

• Eight

• Six

• Seven

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CCSS.2.G.A.1

What is the name of a polygon with 12 sides?

• Decagon

• Hendecagon

• Dodecagon

• Tridecagon

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CCSS.2.G.A.1

How would you name a polygon with 14 sides?

• Tetradecagon

• 14-sided polygon

• 14-gon

• Quattuordecagon

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CCSS.2.G.A.1

What is the naming convention for polygons with more than 12 sides?

• Use the number of angles

• Use Greek prefixes

• Use the number of sides followed by 'gon'

• Use Latin prefixes

Tags

CCSS.2.G.A.1