Subject :IMO Class : Class 6

Following are the steps of construction of an angle of 120°. Identify the wrong step.

(i) Draw a ray

(ii) With A as centre and a convenient radius, draw an arc to intersect at X.

(iii) With X as the centre, draw an arc with the same radius to intersect the above arc at C.

(iv) With C as centre, again draw an arc to intersect the first arc at D.

(v) Draw ray ∠CAB is the required angle of measure 120°

A(iii) and (v) only

B(iv) only

C(i) and (iv) only

D(v) only

ACCORDING TO ME ANSWER IS B