Geometry Through Art

Norman Shapiro

An inscribed octagon

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Table of Contents || List of Constructions
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Given: a regular octagon.

Observe:

Draw eight more diagonals which do not pass through the center of the circle.

Can you find and demonstrate inscribed angles that are half the central angle? For the square? For the octagon? (A central angle is an angle whose vertex is located at the center of a circle; all the vertices of an inscribed angle lie on the circle.)

Central and Inscribed Angles: Sketch (21K)


Inscribed Octagon: Sketch (18K)
List of Constructions

Copyright 1995 Norman Shapiro

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