Answer:
90degrees
Explanation:
The sum of interior angle of a triangle si 180degrees
Hence, 7x-1 + 4x+1 + 3x - 2 = 180
Collect the like terms;
7x+4x+3x-1+1-2 = 180
14x - 2 = 180
14x = 180+2
14x = 182
x = 182/14
x = 13
Get m
From the triangle;
mSubstitute x = 13 into the expression
mmm
Hence the measure of m
