Question

In an equilateral triangle, each exterior angle is ______.

• A. ${60}^o$
• B. ${90}^o$
• C. ${120}^o$
• D. ${150}^o$

Answer 1

Answer: (C)

${120}^o$

In equilateral triangle, every angle = ${60}^o$

Using theorem which states that exterior angle is equal to sum of interior opposite angles.

Hence each exterior angle $={60}^o+{60}^o={120}^o$