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Statement I perimeter of a regular penta...

Statement I perimeter of a regular pentagon inscribed in a circle with centre O and radius a cm equals `10a sin 36^(@)` cm.
Statement II Perimeter of a regular polygon inscribed in a circle with centre O and radius a cm equals `(3n-5)sin ((360^(@))/(2n))cm,` then it is n sided, where `n ge3.`

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