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The exterior angle of a triangle is equal to
1. the value of its adjacent angle.
2. the sum of its opposite interior angles.
3. the product of its opposite interior angles.
4. the difference between its opposite interior angles.
What is the sum of the exterior angles of a triangle?
1. $180deg$
2. $270deg$
3. $360deg$
4. $540deg$
What is the measure of one external angle of an equilateral triangle?
1. $30deg$
2. $60deg$
3. $120deg$
4. $180deg$