Using a protractor, draw an angle of measure 72°. With this angle as given, draw angles of measure 36° and 54°.

Using protractor we have to draw an angle of 72° and considering this angle given draw an angle of 36° and 54°



For this construction we will follow the following algorithm


Steps of Construction


STEP1: Draw angle ABC of measure 72°, using protractor.


STEP2: Bisect angle ABC. Let BD be the bisecting ray.


ABD = DBC = 36°


STEP3: Bisect ABD. Let BE be the bisecting ray.


So,Thus,


Thus, DBC = 36° and EBC = 54° are the required angles.


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