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Interior angle sum of a polygon
A polygon is any closed shape with straight sides. Examples include:
The following are not polygons
Interior angle sum
means all of the angles inside the shape added up. Like the interior angle sum of a triangle is 180°.
Follow the teachers' instructions to complete an activity using Geogebra to find the interior angle sum of a polygon.
The formula for the interior angle sum of
any
polygon is:
ANGLE SUM=
Find the interior angle sum of the following polygons:
a)
angle sum=
n=
angle sum =
=
b)
angle sum=
n=
angle sum =
=
c)
Mathletics
If you have completed your work, have a go at the following matching game. In this game, you will match shapes and their names.
http://www.mathplayground.com/Matching_Shapes.html
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A polygon is any closed shape with straight sides. Examples include:
The following are not polygons
Interior angle sum means all of the angles inside the shape added up. Like the interior angle sum of a triangle is 180°.
The formula for the interior angle sum of any polygon is:
ANGLE SUM=
 Find the interior angle sum of the following polygons:
a)angle sum=
n=
angle sum =
=
b)
angle sum=
n=
angle sum =
=
c)
http://www.mathplayground.com/Matching_Shapes.html