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The two interior opposite angles of an exterior angle of a triangle are 60 degrees and 80 degrees. Find the measure of the exterior angle.

2. The two interior opposite angles of an exterior angle of a triangle are \small 60^{\circ} and \small 80^{\circ}. Find the measure of the exterior angle. 

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As we know that in a triangle, the exterior angle is equal to the sum of opposite interior angles.

So,

Exterior Angle =  \small 60^{\circ}\small 80^{\circ}.

                        = 140^0

Hence the measure of the exterior is 140^0.

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