ericalexington ericalexington
  • 22-08-2018
  • Mathematics
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Find the area of this regular polygon (trigonometry) !!! Please and thank you !! Bogus answers reported

Find the area of this regular polygon trigonometry Please and thank you Bogus answers reported class=

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Shaswat221005
Shaswat221005 Shaswat221005
  • 22-08-2018
If we join the Center with different corners of the polygon,we find 10 Isoceles triangle with equal side=9.14cm, Making an angle of 36° between the equal sides.

Area of 1 triangle= a*b*sinC/2
= 9.14*9.14*Sin36°/2
= 9.14*9.14*0.587/2
=24.51 cm^2

Area of 10 triangle= 24.51*10
= 245.1cm^2

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