in the adjoining figure ABCD is an isoceles trapezium.If angle A=60Degree,DC=20 cm and AD= 15 cm,Find the length of AB?
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Please refer to the following link related to your question.
https://www.meritnation.com/ask-answer/question/abcd-is-an-isosceles-trapezium-with-ab-parallel-to-dc-ad-bc/academics/10611227
Regards,