a. If AM=MB, then A, M and B are collinear.  b. Complementary angles are congruent  c.  The supplement of an obtuse angle is another obtuse angle

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 whether the following sentences are always true (A),  sometimes true (S), or never true (N). In each case, given reason(s) to support your answer. 

a. If AM=MB, then A, M and B are collinear. 

b. Complementary angles are congruent 

c.  The supplement of an obtuse angle is another obtuse angle

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