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# What can you say about each of the interior opposite angles, when the exterior angle is (i) a right angle? (ii) an obtuse angle? (iii) an acute angle?

1.  What can you say about each of the interior opposite angles, when the exterior angle is

(i) a right angle?             (ii) an obtuse angle?             (iii) an acute angle?

Views

(i) a right angle

When the exterior angle is $90^0$, the sum of opposite internal angles is $90^0$

(ii) an obtuse angle

When the exterior angle is the obtuse angle, the opposite interior angles can be both acute, one right and one acute and one obtuse and one acute.

(iii) an acute angle?

When the exterior angle is an acute angle, both the internal angle has to be acute angles.

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