Name: Construction of Angles Using Protractor
Uploaded: 2019-07-19
Duration: 4 min 7 s
Description: We know that an angle is formed when two rays join at a common point. In this video session, learn how to construct angles using a basic geometry tool called a protractor.

Question

Draw an angle of measure

100 °

. Make a copy of it using a ruler and compass only.

Accepted Answer

Given,

The measurement is $= 100 °$ .

To draw an angle using a ruler and a compass we need to follow some steps:

First, draw the ray $O X$ .

Then by using a protractor measure the angle of $100 °$ at $P$ and join $O P$ , we will get angle of measure $100 °$ .

Now, we need to draw the copy of the given angle using a ruler and a compass.

To draw a copy of the given angle we need to follow some steps:

(i) Then draw a ray $A B$ .

(ii) Place the pointed end of a compass at $O$ and draw an arc cutting the arms of the angle at $R$ and $S$ .

(iii) Without changing the compass opening, draw an arc with $A$ as centre and cutting ray $A B$ at $C$ .

(iv) Set the opening of the compass so that its pointed end is at $S$ and pencil end at $R$ respectively.

(v) Without changing the compass opening, place the pointed end at $C$ and cut the perviously drawn arc at $D$ .

(vi) Join $A$ and $D$ to obtain the required angle.

Hence, the required figure is:

So, $∠ D A C$ is the required angle.

Draw an angle of measure $100 °$ . Make a copy of it using a ruler and compass only.

Important Questions on Practical Geometry

Learn and Prepare for any exam you want !

Draw an angle of measure 100°. Make a copy of it using a ruler and compass only.

Important Questions on Practical Geometry

Learn and Prepare for any exam you want !

Draw an angle of measure $100 °$ . Make a copy of it using a ruler and compass only.