math test review

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18. In triangle ABC, m<C=2m<b,m<A=6m<B. what is the measure of <c?
A.5 degrees
B.15 degrees
C.20 degrees
D.30 degrees
E.40 degrees

  • math test review -

    I do not understand your
    m<C=2m<b,m<A=6m<B.
    In our general usage of angles and sides, a capital letter usually stands for an angle, a small letter stands for the length of the opposite side to that angle,
    there also seems to be a missing equal sign.

    If you are saying
    angle C = 2m
    angle B = m
    angle C = 6m

    then we know ...
    2m + m + 6m = 180
    9m = 180
    m = 20

    so angle C = 2(20) = 40°

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