how to construct angle of 150?pls justify

We are in 9th, so you should be knowing to bisect an angle, right?

Draw a 180 degree (line).(QR)

On it, construct 120 degrees (60 + 60) ..... (PT)

Bisect the angle between 180 and 120 degrees.

The bisecting ray (PU) and 0 degree (PR) will form your 150 degree angle

VERIFYING: 180 - 60 = 120

Half of 60 = 30

Therefore angle UPR = 120 + half of 60

= 120 + 30 = 150

Hope i could help!

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