To do :-
- To draw a angle of 150° .
Instruments required:-
- A pair of compasses ,
- A ruler ,
- A pencil ,
- and a protactor
Steps of construction:-
- Draw a line segment of desired length.
- Taking a point on the line , draw a semicircle using a compass .
- Taking G as centre cut an arc on the semicircle mark the point of intersection as I .
- Taking I as centre cut another arc on the semicircle , mark it as point J .
- Taking J and I as center, cut an arc such that both the arcs intersect each other, mark it as point D .
- Join C and D .
- Taking F as centre again cut an arc on the semicircle, mark it as point E .
- Join E and C .
- Using a protactor you can check whether the angle formed is 150° or not .
Hence angle ECB represents 150° .
Precaution:- do not change the arm length of the compass.
and we are done!