Steps of Construction-

1. Draw an angle 70° with protractor, i.e., ∠POQ = 70°

2. Draw a ray AB

3. Place the compasses at O and draw an arc to cut the rays of ∠POQ at L and M.

4. Use the same compasses, setting to draw an arc with A as centre, cutting AB at X.

5. Set your compasses setting to the length LM with the same radius.

6. Place the compasses pointer at X and draw the arc to cut the arc drawn earlier at Y.

7. Join AY.

Thus, ∠YAX = 70°