Question

ab parallel to cd ad is a diamater of circle centre is o prove ab =cd
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Answer 1

Step-by-step explanation:

1. Join AC.
2. Prove congruent the two triangles formed
3. How?By AAA

• AOB=COD(vertically opposite)
• ABO=DCO(Alternate interior angle)
• BAO=CDO(same reason as above)

BY AAA ∆AOB(IS CONGRUENT TO)∆COD

AB=CD(by cpct)