Question

Draw an obtuse angle. Bisect it. Measure each of the angles so formed.

Answer 1

Steps of construction: 

Step 1: Draw an obtuse angle. We choose ∠ABC = 1200. 

Step 2: Draw an arc which intersects AB at P and BC at Q, from center B and choose any radius. 

Step 3: Draw an arc from point P by setting radius more than half of PQ. 

Step 4: Repeat step 3 using Q as center and cut the previous arc at R. 

Step 5: Join BR.

Therefore ∠ABR= ∠RBC = 60°