(a(i))[1]
State the mathematical name of this polygon.
(a(ii))[1]
State the mathematical name of this quadrilateral.
(a(iii))[1]
State the type of angle shown in this diagram.
(b(i))[2]
Calculate the volume of the cuboid.
(b(ii))[1]
Express this volume in cubic metres.
(c(i))[1]
State the mathematical name of the line OD.
(c(ii))[1]
Explain why angle BAD is $90^{\circ}$.
(c(iii))[2]
Calculate the circumference of the circle.
(c(iv))[3]
Calculate CD.