Question
Using a pair of compasses construct the following angles:
120°

Answer


Steps for construction:
  1. Draw a ray QP.
  2. With Q as the centre and any convenient radius, draw an arc cutting QP at N.
  3. With N as the centre and the same radius, cut the arc at A. Again, with A as the centre and the same radius, cut the arc at M.
  4. Draw QM and produce it to R.
$\angle\text{PQR}$ is the required angle of 120°.

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