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.
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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.
