Show:
Angle Sums
Interior Angles
Exterior Angles
Tessellations
Guess the Year
100

What is a formula for finding angle sums?

180(n-2)

or

180n - 360

100

A regular polygon has interior angles that are all ________.

Equal

100

The exterior angles of a polygon must sum to ______.

360-degrees

100

What should the angles add up to around a vertex in a tessellation?

360-degrees

100

In what year was President Obama voted into office?

2008

200

Will the formula 180(n-2) work for any polygon, or just for regular polygons?

Any polygon

200

Interior and exterior angles are _________. (Complementary or Supplementary)

Explain what this means.

Supplementary, meaning they add up to 180-degrees.

200

If you know how many sides a regular polygon has, how can you figure out the measure of each exterior angle?

Divide 360 by the number of sides

200

Will a square tessellate?  Explain why.

Yes because the interior angles of a square are 90-degrees.  Four squares around a vertex will equal 360-degrees.

200

In what year was the first Harry Potter book published?

1997

300

Find the angle sum for a polygon with 100 sides.

17640

300

What are the interior angle measures for a regular pentadecagon (15 sides)?

156-degrees

300

A 16-sided regular polygon has exterior angles that measure ______ degrees.

22.5-degrees

300

How many regular triangles will you need around a single vertex in a tessellation?

6

300

The end of World War 2.

1945

400

Find the angle sum for an irregular decagon.

1440

400

If the exterior angles of a regular polygon are 8-degrees, what are the measures of the interior angles?

172-degrees

400

What are the exterior angle measures for a regular polygon with 1000 sides?

0.36-degrees

400

Will a regular pentagon tessellate?  Explain why or why not.

No because the interior angles equal 108-degrees, and it's impossible for it add up to exactly 360-degrees.
400

First man on the moon.

1969

500

A polygon has an angle sum of 8,640-degrees. How many sides does it have?

50
500

The interior angles of a regular polygon measure 160-degrees. How many sides does the polygon have?

18

500

What is the sum of the measures of the interior angles of a regular polygon whose exterior angles each measure 18-degrees?

3240-degrees (20 sides)

500

Will a circle tessellate?  Explain why or why not.

No.  Although the interior angle of a circle is 360-degrees, it's curved.

500

Toy Story 3 came out.

2010