Triangle sum postulate: the angles of a triangle add to 180°.
Exterior angles are supplementary.
180°-115°=65°
43°+82°+x=180° triangle sum postulate
Triangle: 180/3 = 60° equiangular
Only ONE angle can be right OR obtuse.
Triangle sum postulate: the angles of a triangle add to 180°.
Exterior angles are supplementary.
180°-115°=65°
43°+82°+x=180° triangle sum postulate
Triangle: 180/3 = 60° equiangular
Only ONE angle can be right OR obtuse.
