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
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
A decagon has 10 sides, therefore, with side length 13.5 centimetres, the perimeter would be 13.5 x 10 = 135 centimetres.
find the perimeter of a decagon if all off the sides equal 4mi.
12cm a decagon is 10 sides 120/10=12
Not a regular one.
A radius of a regular triangle is 12 . find the length of one side of the triangle?
144
One sixth of its perimeter.
Length of one side = 114/6 inches = 19 inches
A decagon is a two-dimensional shape with ten sides. In a regular decagon each of the sides will have an equal length.* * * * *AND each interior angle will be the same measure. If either the sides or angles are not ALL equal to one another, the shape is not regular. Consider quadrilaterals, for example. A rhombus has equal sides but the angles are not all the same so it is not regular. A rectangle has equal angles but the sides are not the same. So it is not regular either. The only regular quadrilateral is a square.
First of all, a decagon is a polygon with 10 sides. A regular decagon is a decagon in which all of the sides and angles are equal. Since there are 360o in a complete rotation, you can simply divide 360o by 10. 360o / 10 = 36o