Question

what is the answer?????​

Answer 1

Explanation:

First, draw an angle of 80° say ∠QOA = 180° with the help of protractor. Now, use the the following steps to construct angles of



(1)40° 2() 160° (3) 120°

1.Taking O as centre and any radius draw an arc which intersect OA at E and OO at F.

2.Taking E and F as centres and radius more than 1/2 EF draw arcs which intersect each other at P.

3.Join OP Thus, ∠POA = 40° [∴ 40° = 1/2 x 80°]

4.Now, taking F as centre and radius equal to EF draw an arc which intersect previous arc obtained in step ii at S.

5.Join OS. Thus, ∠SOA = 160° [∴ 160° = 2 x 80°]

6.Taking S and F as centre and radius more than 1/2 SF draw arcs which intersect each other at R.

7.Join OR. Thus, ∠ROA = ∠ROQ = 40° + 80°= 120°.