B 1300
A, B, C and D are points on a circle, centre O.
BC = CD.
Angle BCD= 130°
(a) Write down the size of angle BAD.
Give a reason for your answer.
Because angle
in a cyclical
cyclical quadrica
adds up to 180°
Soo
(b) Work out the size of angle ODC.
Give reasons for your answer.​

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