Polygons

A line from the center of a regular polygon at right angles to any of its sides.

• apothem
• radius
• permimeter
• area

Find the area.

• 12.5
• 6.3
• 2.8
• 5.6

REGULAR in Maths means...

• Normal
• Two sides have the same length
• All sides are equal and all angles are equal
• It has right angles

What is the name of a 10-sided polygon?

• Dodecagon
• Decagon
• Nonagon
• Ocatgon

What is a regular polygon?

• Polygon with all sides congruent
• Polygon with all angles congruent
• Polygon with all sides and angles congruent
• Polygon with no sides or angles congruent

How do you find the sum of the interior angles of a polygon?

• 180(n-2)
• 180
• (180(n-2))/n
• 360

How do you find the sum of the exterior angles of a polygon?

• 180(n-2)
• 180
• (180(n-2))/n
• 360

How do you find one exterior angle of a regular polygon?

• 360
• 180(n-2)
• 360/n
• ((180(n-2))/n

If the polygon is regular, what is the measure of angle d?

• 72 degrees
• 360 degrees
• 540 degrees
• 108 degrees

If the polygon is regular, what is the measure of angle h?

• 360
• 540
• 72
• 108