(6.1) Polygons

Classify Polygons

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Multiple Select

Which of the following shapes are not polygons?

Multiple Choice

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

• Not a polygon, convex

• Polygon, convex

• Not a polygon

• Polygon, concave

Multiple Choice

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

• Not a polygon, convex

• Polygon, convex

• Not a polygon

• Polygon, concave

Multiple Choice

The name of this polygon is

• Heptagon

• octagon

• Hexagon

• Nonagon

Multiple Choice

Name the polygon.

• Octagon

• Pentagon

• Hexagon

• Quadrilateral

Multiple Choice

The name of a polygon with 5 sides is:

• Pentagon

• Nonagon

• Fivetagon

• Octagon

Multiple Choice

How many sides does a decagon have?

• 12

• 11

• 9

• 10

Multiple Choice

What is the name of a 12-sided polygon

• Decagon
• Dodecagon
• Dozengon
• Noonagon

Parts of a Polygon

• Vertex : Point where two sides intersect.

• Side : Line Segment between vertices.

• Interior Angle : Angle inside the polygon formed by two sides.

• Exterior Angle : Angle outside the polygon formed by two sides.

• Diagonal : Segment that connect two non-consecutive vertices.

Multiple Choice

Diagonals have points that are outside the polygon

• Convex polygon

• Concave polygon

• Regular polygon

• Dodecagon

Multiple Choice

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.

Multiple Choice

Name the polygon. Determine if it appears to be regular or not regular.

• 8 sides, not congruent, not regular octagon

• 8 sides, congruent, regular octagon

Multiple Choice

Name the polygon. Determine if it appears to be regular or not regular.

• quadrilateral; regular

• quadrilateral; not regular

• hexagon; regular

• hexagon; not regular

Polygons

• Regular : All sides and angles are Congruent

• Irregular : Any polygon that is not Regular.

• Concave : A line that contains a side passes outside the polygon.

• Convex : No line that contains a side passes through the polygon.

Angles of Quadrilaterals

Words: The sum of the angle measures of a quadrilateral is 360°.

Algebra: w + x + y + z = 360

Fill in the Blanks

Write and solve an equation to find the value of x.

Type your answer as x=

(no spaces)

Ex: x=12