(a(i))[1]
Complete the sentence. Angle $ABC$ is $90^\circ$ because ...
(a(ii))[2]
Find the area of triangle $ABC$.
(a(iii))[2]
Find $AC$.
(b)[2]
Make $r$ the subject of the formula $A = \pi r^2$.
(c)[4]
Find the shaded area.
Mathematics 0580 · IGCSE · Circle theorems I
Circle theorems I — practice question
Points A, B and C are on a circle with centre O and AC as the diameter. The diagram is not drawn to scale. AB measures 6 cm and BC measures 10 cm.