Question

how to mske angle of 30

Answer 1

Constructing a 30º Angle

We know that:

1/2 of 60°= 30°

So, to construct an angle of 30º, first construct a 60º angle and then bisect it. Often, we apply the following steps.

Step 1:  Draw the arm PQ.
Step 2:  Place the point of the compass at Pand draw an arc that passes through Q.
Step 3:  Place the point of the compass at Qand draw an arc that cuts the arc drawn in Step 2 at R.
Step 4:  With the point of the compass still at Q, draw an arc near T as shown.
Step 5:  With the point of the compass at R, draw an arc to cut the arc drawn in Step 4 at T.
Step 6:  Join T to P.  The angle QPT is 30º.