(a)[1]
Write down the mathematical term for this solid.
(b)[2]
Find $x$.
(c)[2]
Work out the size of one interior angle in a regular polygon with 15 sides.
(d(i))[1]
Write down the mathematical name of the line $BC$.
(d(ii))[1]
Draw a tangent at point B to the circle.
(d(iii))[3]
Calculate $AB$.
(d(iv))[2]
Find the value of $y$.