(a)[1]
Show that a single interior angle of the polygon equals $150^\circ$.
(b(i))[3]
Show that the circle's radius, $AO$, is 11.6 cm, correct to 1 decimal place.
(b(ii)(a))[2]
Calculate the circle's circumference.
(b(ii)(b))[2]
Calculate the perimeter of the shaded minor segment bounded by chord $AB$.
(c)[3]
Calculate the prism's volume.