SEAMO 2019 — Paper C — Grade 5–6 Question 17

Question 17

An equilateral triangle of side $1$ rotates clockwise about $C$, then about its moved vertex $B$, as shown. Find the total distance travelled by vertex $A$.

Question illustration

$\frac75\pi$
$\frac65\pi$
$\frac53\pi$
$\frac43\pi$
None of the above