We will discuss here about measuring an angle with the help of
a protractor.
You can find it in your Geometry Box. It has the semicircular shape. Its semicircular edge is divided into 180 divisions. Each division represents a degree denoted by °.
There are two scales marked on the protractor – outer and inner. The outer scale is marked from 0° to 180° in clockwise direction.
To measure the given ∠MON, we place the protractor in such way that its centre is on the vertex O of ∠MON and its straight horizontal edge lies on the arm ON of the ∠MON as shown in figure.
Now we see which degree mark on the scale of the protractor, the arm OM coincides with. In the given figure, OM coincides with 90°. So, the ∠MON measures 90°.
`From Measuring an Angle to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.