A "Complex" Proof for a Geometric Construction of a Regular Pentagon.

Lambert, Gary E.

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ERIC Number: EJ195354

Record Type: Journal

Publication Date: 1979-Jan

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A "Complex" Proof for a Geometric Construction of a Regular Pentagon.

Lambert, Gary E.

Mathematics Teacher, v72 n1 p65-66 Jan 1979

Complex numbers and trigonometry are used to prove that a given constructed line is equal to the length of one side of a regular pentagon inscribed in a unit circle. (MP)

Descriptors: Geometry, Instruction, Mathematics, Number Concepts, Secondary Education, Secondary School Mathematics, Trigonometry

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Language: English

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