Question

pl find measure of angle A
explain details pl

Answer 1

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Here Is The solution.....
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Answer 2

if exterior angle is given ,so, u have to wrote it first that. Exterior angle is formed by addition of
his remote interior angle and they are supplementary.
exterior angle is given as 70° (c)
hence , remote interior angles are A and C
they will be 40 and 30 respectively