Question

Exterior angles of a triangle are ${120}^o$ each. One side of the triangle is $6$ cm. Find the dimension of the other two sides.

• A. $3$ cm
• B. $4$ cm
• C. $6$ cm
• D. $12$ cm

Answer 1

The correct option is C $6$ cm

Exterior angles of a triangle are ${120}^o$ each.
$\therefore$ The interior angles are ${180}^o-{120}^o={60}^o$

Hence, it is an equilateral triangle, i.e., all sides have equal dimensions.

$\therefore$ All the sides have the dimension of $6$ cm.