a Draw an ZABC of measure 155° using a protractor. Then, using a ruler and compasses, construct an angle equal to a ZABC.
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1. Draw a ray BC.
2. With the help of a protractor, draw an ∠ABC of 115
∘
.
3. With one end of the compass at B, mark two equidistant arcs on rays BA and BC.
4. From the two points on the rays, draw two intersecting arcs. Join B to the intersection point of those arcs.
Ray BM is the angle bisector of ∠ABC.
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