What can you say about each of the interior opposite angles when the exterior angle is a right angle, an obtuse angle, an acute angle

Dear Student,

We know from external angle theorem that  An measure of an exterior angle of a triangle is equal to the sum of the measures of the two non - adjacent interior angles ( Opposite angles ) .

If external angle is right angle so sum of the measures of the two non - adjacent interior angles ( Opposite angles ) = right angle ( 90 ) .

If external angle is obtuse angle so sum of the measures of the two non - adjacent interior angles ( Opposite angles ) = obtuse angle  ( More than 90 ) .

If external angle is acute angle so sum of the measures of the two non - adjacent interior angles ( Opposite angles ) = acute angle (Less than 90 ) .

Regards