Ptolemy's Theorem and Familiar Trigonometric Identities.

Bidwell, James K.

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Peer reviewed

ERIC Number: EJ478338

Record Type: Journal

Publication Date: 1993

Pages: N/A

Abstractor: N/A

ISBN: N/A

ISSN: ISSN-0036-6803

EISSN: N/A

Ptolemy's Theorem and Familiar Trigonometric Identities.

Bidwell, James K.

School Science and Mathematics, v93 n8 p435-39 Dec 1993

Integrates the sum, difference, and multiple angle identities into an examination of Ptolemy's Theorem, which states that the sum of the products of the lengths of the opposite sides of a quadrilateral inscribed in a circle is equal to the product of the lengths of the diagonals. (MDH)

Descriptors: Geometric Concepts, Mathematical Concepts, Mathematics Education, Mathematics History, Mathematics Instruction, Secondary Education, Secondary School Mathematics, Trigonometry

Publication Type: Guides - Classroom - Teacher; Journal Articles

Education Level: N/A

Audience: Teachers; Practitioners

Language: English

Sponsor: N/A

Authoring Institution: N/A

Grant or Contract Numbers: N/A