Question: T 20 A, B, C and D are points on the circumference of a circle, centre O. ADE and BCE are straight lines. O 1320

T 20 A, B, C and D are points on the circumference of a circle, centre O. ADE and BCE are straight lines. O 1320 B C 160 E Work out the size of angle CDE. Give a reason for each stage of your working

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