Question -
Answer -
Steps of construction :
(i) Draw an angle ABC = 12┬░ with the help of protractor.
(ii) With centre B and a suitable radius, draw an arc EF.
(iii) With centre E and F, draw arcs intersecting
each other at G and produce it to D.
Then BD is the bisector of тИаABC.
тИ┤ тИаDBC = 72┬░ x
┬а= 36┬░. (iv) Again bisect тИаABD in the same way then PB is the bisector of тИаABD.
тИ┤ тИаPBC = 36┬░ +┬а┬а┬аx 36┬░ = 36┬░ + 18┬░ = 54┬░
Hence тИаPBC = 54┬░