# Nonagon

Calculate the area and perimeter of a regular nonagon if its radius of inscribed circle is r = 10cm

Correct result:

S =  327.5732 cm2
o =  65.5146 cm

#### Solution: We would be pleased if you find an error in the word problem, spelling mistakes, or inaccuracies and send it to us. Thank you! Math student
I need to draw a nonagon for my daughter and she has to have each at 4cm Matematik
try to start with angle 360/9 = 40°... Draw nine isosceles triangles with base a=4 cm and opposite angle 40°.
Or if you may calculate diameter of described circle - draw a circle and divide it into nine equal segments. (divide by 40° angle) Tips to related online calculators
Pythagorean theorem is the base for the right triangle calculator.

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