In an equilateral triangle, what is the measure of each exterior angle?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 120°
An exterior angle and the interior angle next to it lie on a straight line, so they add up to \(180^\circ\). Each interior angle of an equilateral triangle is \(60^\circ\).
Exterior angle \(=180^\circ-60^\circ=120^\circ\)
The three exterior angles together make \(3\times120^\circ=360^\circ\), as for every polygon