Polygon Lab Save this as Lastname Firstname Polygon Lab Example: Hylemon Jennifer Polygon Lab

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Polygon Lab(Save this as Lastname Firstname
Polygon Lab)(Example Hylemon Jennifer Polygon
Lab)

• Geometry, Chapter 10, Section 1
• Yellow Pages are notes.
• Orange Pages are interactive.

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polygon

• A closed figure formed by segments such that the
  sides have a common endpoint and each side
  intersects exactly two other sides at their
  endpoints is known as a polygon.

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convex vs. concave
Lines stay outside
Lines cross inside
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3 sides triangle
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4 sides quadrilateral
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5 sides pentagon
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6 sides hexagon
Draw your own hexagon below.
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7 sides heptagon OR septagon
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8 sides octagon
Draw your own octagon below.
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9 sides nonagon
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10 sides decagon
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12 sides dodecagon
Draw your own dodecagon below.
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n sides n-gon
For example, an 11-gon.
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regular polygon

• A polygon that is convex with all sides congruent
  and all angles congruent is known as a regular
  polygon.

108 degrees
108 degrees
108 degrees
Click on the polygon for more info
108 degrees
108 degrees
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Draw a regular triangle. Label angle measures
correctly.
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Interior Angle Sum Theorem

• If a convex polygon has n sides and S is the sum
  of the measures of its interior angles, then

For example, a triangle has 3 sides. n 3.
Click on triangle for more info
The angles add up to 180 degrees.
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Use the Interior Angle Theorem to fill in the
table.
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Is this a polygon? Explain why or why not.
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Is this polygon convex or concave? Explain your
answer.
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What is a good name for this polygon?
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This is a regular octagon. What is the measure
of each individual interior angle?
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Save this file. Copy the interactive slides to a
new PowerPoint presentation. Name this new file
with your name and 10-1 in the title. Turn it in
to me by beaming it to me. If I find that your
work is copied from someone else or is copied by
someone else, you will receive a ZERO for this
assignment that cannot be replaced.