(Q4) Draw a pair of radii OA and OB such that ∠BOA = 120°. Draw the bisector of ∠BOA and draw lines perpendiculars to OA and OB at A and B.These lines meet on the bisector of ∠BOA at a point which is the external point and the perpendicular lines are the required tangents. Construct and justify

PABO

Justification:

OA ⟂ PA

OB ⟂ PB

Also in △ OAP ,△ OBP

OA =

∠OAP = ∠

OP - OP

△OAP similarly △

PA = [Q.E.D.]