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Pick a point around the center of the polygon. Join each vertex to this point. You will now have 10 triangles. The total angle of these 10 triangles is 10x180 degrees. Now you need to subtract the angles of the ten triangles at the center (which is 360 degrees). Therefore total internal angles is (10x180)-360 = 1800-360 which is 1440 degrees.
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What degree angle do you cut your wood to make a decagon?
Any angle that you like. There are no constraints on a single angle of a decagon, only on their sum.
What does angle sum mean?
It means the sum of the angles measurement.
What is the interior angle sum of the decagon?
The interior angle of a 10 sided decagon add up to 1440 degrees
What is the size of an exterior angle of decagon?
An exterior angle of a decagon can have any value in the range (0, 360) degrees - excluding 180 degrees. The only constraint is that the sum of all exterior angles must be 360 degrees.
How do you work out exterior angle of an decagon?
You cannot. An exterior angle of a decagon can have any value.
