Polygons
6
What is the sum of the interior angles of a triangle?
180 degrees
A shirt costs 400 PHP and is now 500 PHP.
Increase or Decrease?
Increase
True or False:
All squares are regular polygons.
True
A polygon has an interior angle sum of 900 degrees.
How many sides does it have?
7
Name the polygon with 9 sides
Nonagon
What is the sum of the interior angles of a pentagon?
540 degrees
A school had 500 students. It now has 600 students.
Find the percent of increase.
20%
Is every rectangle a regular polygon?
No, not every rectangle is a regular polygon. To be classified as a regular polygon, a shape must be both equilateral (all sides equal in length) and equiangular (all interior angles equal in measure).
Find the number of diagonals of a 15-sided polygon.
What is the difference between a regular and an irregular polygon?
A regular polygon has equal sides and equal angles; an irregular polygon does not.
A regular hexagon has an exterior angle of?
60 degrees
A phone costs 8,000 PHP and is now 6,400 PHP.
Find the percent of decrease
20%
Find the number of diagons of a hexagon
9
The price of a bicycle increased from 12,000 PHP to 15,000 PHP.
Find the percent increase
A polygon has 12 sides. What is its name?
Dodecagon
Find one interior angle of a regular octagon
135 degrees
The price of rice increased from 50 PHP to 58 PHP per kilogram.
Find the percent increase.
16%
What is the sum of the exterior angles of any polygon?
360 degrees
A regular polygon has 20 sides.
Find:
Sum of interior angles
One interior angle
One exterior angle
162 degrees
18 degrees
How many diagonals does a decagon have?
A regular polygon has an exterior angle of 24 degrees. How many sides does it have?
15
A family's electricity bill dropped from 2,400 PHP to 1,800 PHP.
Find the percent decrease.
25%
Find one interior angle of a regular decagon.
144 degrees
A regular polygon has 18 sides
Find:
Sum of interior angles
One interior angle
One exterior angle
Number of diagonals
2,880 degrees
160 degrees
20 degrees
135 diagonals