M8L2: Tuesday November 18th

Open Ended

How many siblings do you have?

Open Ended

Based on the diagram, classify the polygon by its number of sides and determine if it is regular or irregular, convex or concave.

Multiple Select

Which of the following statements are true about regular polygons?

• All sides are equal in length.

• All interior angles are equal.

• All exterior angles are equal.

• All polygons are regular.

Draw

Example 2: Find the sum of the interior angles of a 21-gon.

Draw

Example 4: What is the measure of each interior angle of a regular 18-gon?

Multiple Choice

Which of the following formulas is used to find the sum of the interior angles of a polygon with n sides?

• (n-2) × 180°

• n × 180°

• (n+2) × 180°

• n × 360°

Draw

Example 6: What is the measure of each exterior angle of a regular 24-gon?

Multiple Choice

Example 8: If the exterior angle of a regular polygon measures 40°, how many sides does it have?

• 9

• 8

• 6

• 12

Draw

Draw a picture on how you feel for each statement.