Pentagon Inscribed in a Circle

Inscribe a pentagon in a circle of diameter 70 mm.

• Draw a circle of diameter 70 mm.

• Draw the diameter lines PQ and RS, mutually perpendicular to each other.

• Locate mid-point T of a line PO.

• By taking radius TS and center T, draw an arc cutting the line PQ at U.

• By taking center S and radius SU, draw an arc cutting the circle at point C and E.

• Locate point D, overlapping on S.

• Locate points A and B by taking centers E & C and radius CD respectively.

• Join points A, B, C, D, E and A in order to complete pentagon.