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What does it mean to be "∆Y equivalent"? So for example K6 is ∆Y equivalent to the Petersen Graph?

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter10: Analytic Geometry

Section10.CT: Test

Problem 6CT: Using the table from Exercise 5, sketch the graph of 2x+3y=12.

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What does it mean to be "∆Y equivalent"? So for example K6 is ∆Y equivalent to the Petersen Graph?

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