(a(i))[1]
Find $y$.
(a(ii))[2]
Calculate how many sides polygon $A$ has.
(b(i))[3]
Show that angle $OAC = (90 - x)^\f$. Give your reasons for the answer.
(b(ii))[2]
Given angle $BAO = 54^\f$ and angle $OCB = 11^\f$, find the value of $x$.
Mathematics 4024 · O Level · Angles
Angles — practice question
The figure shows equilateral triangle $B$ together with part of regular polygon $A$, and they share one side. The interior angle of polygon $A$ is $165^\f$.