how to draw 135 degree angle without using protractor?
Follow the given steps to construct the angle measuring 135º.
Step 1: Draw a line AB and take a point O on it.
Step 2: Draw an arc with O as centre and any radius, such that it cuts AB in points C and F.
Step 3: Taking C as centre and with the same radius taken in step II, mark an arc which intersect the arc at D. Now, with D as centre and same radius, mark an arc which intersects the arc in E.
Step 4: Taking D and E as centres, draw two arcs which intersect in G.
Step 5: Join OG, which intersects the arc in I. ( ∠GOB = ∠GOA = 90°)
Step 6: Now, taking I and F as centres, draw two arcs which intersect in J. Join OJ. (∠GOJ = 45°)
∠JOB = ∠GOB + ∠GOJ = 90° + 45° = 135°
Thus, ∠JOB is the angle measuring 135°.