Question

Minimum number of arcs drawn in the construction of 120 degree angle are _______.

• A. 2
• B. 3
• C. 4
• D. 6

Answer 1

The correct option is B 3

Step 1:
Draw a line ‘l’ and mark a point ‘O’ on it.

Step 2 :

With ‘O’ as center draw an arc of any radius to cut the line l at A.

Step 3 :

(i) With same radius and with ‘A’ as center draw another arc to cut the previous arc at ‘B’.

(ii) With ‘B’ as center draw another arc of same radius to cut the first arc at ‘C’.

Step 4 :

(i) Join OC.
(ii) We get the required angle ∠AOC = 120°.