What is the smallest number of colours that must be used (including the light blue) to fill the regions so that no two adjacent regions are the same colour? Note: two regions are adjacent if they share a common border (A) 4 (B) 5 (C) 6

What is the smallest number of colours that must be used (including the light blue) to fill the regions so that no two adjacent regions are the same colour? Note: two regions are adjacent if they share a common border (A) 4 (B) 5 (C) 6

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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Question

What is the smallest number of
colours that must be used
(including the light blue) to fill
the regions so that no two
adjacent regions are the same
colour?
Note:
two regions are adjacent if they share a
common border.
you may use the light blue again
●
(A) 4
(B) 5
(C) 6
(D) 7

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