(a)[1]
Determine angle BÂO.
(b)[2]
Determine angle AÔC.
(c)[1]
Determine angle ABC.
(d)[1]
Determine angle CDA.
Mathematics 0580 · IGCSE · Circle theorems I
Circle theorems I — practice question
In the figure, A, B, C and D are points on the circle with centre O. EA is a tangent to the circle at A, and angle EAB is $61^\circ$ while angle BAC is $55^\circ$.