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11.02.2020 •
Mathematics
Patrick is building a patio in the shape of a decagon with a radius of 12 feet. To determine the amount of cement needed, he must first find the area.
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Ответ:
The area of the Patrick's building is .
Step-by-step explanation:
Shape of the Patrick's building = Decagon
In the figure attached:
Radius of the decagon = r = 12 feet
Side of the decagon = a
Angle AOB = 36°
Using trigonometric ratio is triangle AOC :
AO = r = 12 feet
AC =
Area of decagon :
The area of the Patrick's building is .
Ответ:
Step-by-step explanation:
where
=
Hope that helps :)