130
What! How about one tenth of its perimeter?
Chat with our AI personalities
Any polygon is regular if its sides are all the same length, or irregular if they're not. If all 10 sides of your decagon are the same length, then you have a regular decagon. If they're not, then you have an irregular one.
The formula for determining the area of a decagon is A = 2.5dt where t is the length of one edge and d is the distance between two parallel sides
Not a regular one.
A radius of a regular triangle is 12 . find the length of one side of the triangle?
144