Step-by-step explanation:
the sum of interior angles in a triangle is 180°
so
2x+2+12x-8+6x+6=180
20x=180
x=180/20=9
so
m<A =6x+6=6*9+6=54+6=60
m<M=12x-8=12*9-8=100
m<N=2x+2=2*9+2=18+2=20
MAN is an obtuse triangle
because of 100° angle
question 4
isosceles
