Lesson 1.6: Classify Polygons

Organize these options into the right categories

Groups:

(a) Convex polygons

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(b) Concave polygons

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Match the following

• Quadrilateral

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• Triangle

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• Pentagon

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• Octagon

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Is the figure a polygon? Is it convex or concave?

• Not a polygon, convex
• Polygon, convex
• Not a polygon
• Polygon, concave

Is the figure a polygon? Is it convex or concave?

• Not a polygon, convex
• Polygon, convex
• Not a polygon
• Polygon, concave

What is a polygon?

• A closed plane figure made up of line segments
• An open plane figure made up of line segments
• A closed plane figure made up of rays
• An open plane figure made up of rays

How many sides does a Decagon have?

• 12
• 9
• 7
• 10

How many sides does a nonagon have?

• 7

• 9

• 11

• None

A hexagon is a 7-sided polygon.

• True

• False

Which shape is a hexagon?

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What is a regular polygon?

• A polygon that has 1 set of parallel sides and 1 right angle.

• A polygon that has 2 sets of parallel sides and 2 right angles.

• A polygon that has 2 right angles and 2 sides congruent.

• A polygon in which all sides and all angles are congruent.