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14-06-2020
Mathematics

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mhanifa mhanifa

14-06-2020

Answer:

First option

Step-by-step explanation:

If B wasn't 40 then sum of angles in right triangle would be different from 180 deg

Angle C is right angle, C=90 and A= 50

Sum of angles= 180

B= 180- (90+50)= 40 deg

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