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.