IKMC 2027 - Grades 7-8 - Self-study SET 2 - Thematic Batch 3 Question 17

Question 17

Equilateral triangle $ACD$ is rotated counterclockwise about $A$ until it coincides with triangle $ABC$. Through what angle has it rotated?

Question illustration

$60^\circ$
$120^\circ$
$180^\circ$
$240^\circ$
$300^\circ$