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Earn +20 ptsQ: What is a decagons internal angle?
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Which triangle does have one internal angle of 120 degrees?
An obtuse angled triangle can have can have one internal angle of 120 degrees.
How many sides does a regular polygon have if the measure of an angle is 12?
The smallest internal angle possible for a regular polygon is 60 degrees. So either the angle is not 12 degrees or it is not an internal angle.
What is the external angle of a triangle?
360 degrees take away the internal angle
1oo sided shape?
3o decagons
How do you calculate the internal angle of a decagon?
The internal angle of any polygon with n sides is equal to (n - 2) x 180 / n degrees. For example, each internal angle of a square is equal to (4 - 2) x 180 = 360/4 = 90 degrees.
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