In this section, you will learn how to construct angles using protractor.
To construct an angle using protractor, we must need the following mathematical instruments.
1. Ruler
2. Protractor
Example 1 :
Construct an acute angle of 60°.
Step 1 :
Draw a line segment PA.
Step 2 :
(i) Place the protractor on the line segment PA
(ii) Place the mid point of the protractor at point P as shown in the figure.
Step 3 :
(i) On PA from the right start counting from 0° in the ascending order (counter clock wise direction and finally mark a point Q using a sharp pencil at the point showing 60° on the semi-circular edge of the protractor.
(ii) Remove the protractor and join PQ.
(iii) We get the required angle ∠APQ = 60°.
Example 2 :
Construct an acute angle of 125°.
Step 1 :
Draw a line segment PA.
Step 2 :
(i) Place the protractor on the line segment PA.
(ii) Place the mid point of the protractor at point P as shown in the figure.
Step 3 :
(i) On PA from the right start counting from 0° in the ascending order (counter clock wise direction ) and finally mark a point Q using a sharp pencil at the point between 120° and 130° showing 125° on the semicircular edge of the protractor.
(ii) Remove the protractor and join PQ.
(iii) We get the required angle ∠APQ = 125°.
Apart from using protractor, we can construct angles using ruler and compass also.
To know how to construct angles using ruler and compass,
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