Question

Q5) Use geometrical Instrument to construct following angle & bisect it.
1) 170° 2) 80°​

Answer 1

Answer:

80°

Steps of construction:

• Construct a ray OB
• Using the protractor construct ∠AOB of 80 °
• Considering O as centre and convenient radius construct an arc cutting the sides OA and OB at the points Q and P
• Considering Q as centre and radius more than half of the angle PQ, construct an arc
• Considering P as the centre and radius more than half of the angle PQ, construct another arc which intersects the previous arc at the point R
• Join the points OR and produce it in order to from a ray OX
• Therefore, OX is the bisects of the ∠AOB
• So the measure of each parts of the bisected angle is ∠AOX=∠BOX=40°