The measures of the three angles of a triangle are given by #18x-7, 12x + 9#, and #4x#. What is the measure of the largest angle?

1 Answer
Roella W.
Jan 6, 2016

#~~87.2#

Explanation:

The angles of a triangle add up to #180# degrees or #2pi# radians.
#:. (18x - 7)+(12x+9)+4x = 180#
#34x +2 = 180#
#x = 178/34#
Then #18x-7 ~~ 87.2#
#12x+9 ~~71.8#
#4x ~~ 20.9#

The largest angle is #87.2#

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