Warm up!What kind of polygon am I?

This should take you 10 seconds…

For your exams…The average was a %...The median was a %...

…and a kiddos haven’t taken it yet…

The Wørd

Section 8.1Classifying Polygons

Convex PolygonsPolygons are convex if their extended sides do not pass

through the interior.

It’s great to be back folks…

Concave PolygonsPolygons are concave if their

extended sides do pass through the interior.

…I mean really…

What kind of polygon am I?…it’s truly an honor.

A polygon is equilateral if all it’s sides are congruent.

3

I have had enough…

A polygon is equiangular if all it’s angles are congruent.

…of the sleeping in…

A regular polygon is both equilateral and equiangular.

5

…hanging out with my friends…

Round 2!

…playing video

games…

Round 2!

…and doing whatever I

wanted.

Round 2!33

3 3

This is where it’s at…

Round 2!

…teaching limits…

Round 2!

…and geometry…

Section 8.2Angles in Polygons

The Polygon Interior Angles TheoremThe sum of the measures of the

interior angles of a convex polygon with n sides is 180(n-2).

…to kids that would rather be doing…

Find the measure of the missing interior angle.

120

111100

88

…any of the things I just mentioned.

Find the measure of the missing interior angle.

130

150

122100

80

To make matters worse…

The Polygon Exterior Angles TheoremThe sum of the measures of the

exterior angles of a convex polygon is 360 degrees.

…I bet it’s sunny and nice out right now.

Find the measure of the missing exterior angle.

110

7199

Which means…

Find the measure of the missing exterior angle.

6860

90

65

…you probably would just simply like to be

outside.

Solve for x.

8x-2121

72

89

So I think I’ll just give

up…

Solve for x.

6x111

59100

Find the measure of an interior angle of the regular polygon.

Find the measure of an interior angle of the regular polygon.

And your homework!8.1: 10-21, 33-38

8.2: 17-25