The given measures of one triangle is .
Sum of the angle measures is .
(Add: )
(Subtract: )
, and have same measure.
Let = the measure of and .
(Sum of the angle measures is )
(Subtract 42 from each side)
(Apply additive inverse property: )
(Apply additive identity property: )
(Add:
(Subtract:
(Divide each side by 2
(Cancel common term)
(Divide: )
The angles and .
The given angle measures are not equal.
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