Construct an angle of 120^(@), using ruler and compasses only.

STEPS OF CONSTRUCTION (i) Draw a ray OA. (ii) With O as centre and a convenient radius, draw a long arc, cutting OA at P. (iii) With as centre and the same radius as above, draw an arc, cutting the previous arc at Q. (iv) With Q as centre and the same radius, draw yet another arc, cutting the arc drawn in Step (ii) at R. (v) Join OR and produce it to a point B. Then, angleAOB is the required angle of measure 120^(@).

Construction of Angles Using Protractor and Compass

ERCISE 14.3 Draw an angle of measure 84∘ and construct its angle bisector..

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Draw the following angles using ruler and compasses. Also label them. 45^{o}

Construction of Some Standard Angles (30°, 45°, 60°, 90°, 120° and 135°) - Steps and Examples

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How to construct 120 degree angle with compass.

Constructing Angles of 60º, 120º, 30º and 90º

Draw angle ABC = 120^circ . Bisect the angle using the ruler and compasses only. Measure each angle so obtained and check whether the angles obtained on bisecting angle ABC are equal