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Construct a 90 degree angle isosceles triangle which will have equal sides and then divide the base into 9 equal parts joining the parts by lines to the apex of the trangle. Each line represents 10 degrees and 8 lines will equal to 80 degrees.
The radius of a circle is equal to half of it's diameter. To convert the diameter into the radius, simply divide it by two.For example: if the diameter is 10, then the radius would be 5
I say yes. 8/10 divide by 2=4/5
10 cm