Consider ABD such that angle ADB=20° and C is a point on BD such that AB=AC and CD=CA. Then the measure of angle ABC is-

30°

40°

45°

60°


Description (বিবরণ) :

প্রশ্ন: Consider ABD such that angle ADB=20° and C is a point on BD such that AB=AC and CD=CA. Then the measure of angle ABC is-

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