Interior Angles
Exterior Angles
Triangles
Classify Polygons
Challenge
100
The sum of the interior angles of an octagon is...
1080o
100
The sum of the exterior angles on any polygon is...
360
100
See whiteboard question #1
Find the measure of x.
x = 6
100
Concave or Convex?
Concave
100
What is the measure of one interior angle of a regular decagon?
144 degrees
200
The formula for the sum of the interior angles of a polygon with n sides is...
180(n-2)
200
The measure of the exterior angles of a REGULAR hexagon is...
60 degrees
200
See whiteboard question 2.
Find x.
x = 21
200
What makes a polygon regular?
All sides and angles are congruent?
200
What is the measure of one exterior angle of a polygon with 360 sides?
1 degree
300
The sum of the interior angles of a nonagon is...
1260 degrees
300
The sum of the exterior angles of a 36-gon is...
360 degrees
300
See Whiteboard question 3
Find y.
y = 39
300
Regular or Nonregular?
Regular
300
What is the measure of 1 interior angle of a regular 15-gon?
156 degrees
400
The sum of the interior angles of a polygon with 17 sides is...
2700
400
The measure of an exterior angle of a REGULAR quadrilateral is...
90 degrees
400
See whiteboard question 4.
Find the length of BC.
30 Units
400
I'm thinking of a regular quadrilateral. What do we call this shape?
Square
400
I'm thinking of a regular polygon whose interior angles each measure 156 degrees. How many sides does the polygon have?
15 sides
500
The measure of 1 interior angle of a REGULAR pentagon is...
108o
500
A regular polygon with an exterior angle measure of 18 degrees has how many sides?
20 SIDES
500
See whiteboard question 5
Find y.
y = 8
500
What do you call a polygon with 7 sides?
Heptagon
500
I'm thinking of a regular polygon whose exterior angles each measure 3.6 degrees. How many sides does this polygon have?
100 sides