State in geometric language, then prove (also geometrically): (a + b + c)² = a² + b² +c² + 2ab + 2ac+2bc (Note that you may refer to propositions in Book II)

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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State in geometric language, then prove (also geometrically):
(a+b+c)² = =a² + b² + c² + 2ab + 2ac+2bc
(Note that you may refer to propositions in Book II)
Transcribed Image Text:State in geometric language, then prove (also geometrically): (a+b+c)² = =a² + b² + c² + 2ab + 2ac+2bc (Note that you may refer to propositions in Book II)
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