Angle measure - Definition with Examples

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What is an Angle Measure? 

In geometry, an angle measure can be defined as the measure of the angle formed by the two rays or arms at a common vertex.

Angle measure of an angle

Angles are measured in degrees ( °), using a protractor

Using a protractor to measure angles

  Fun Facts

  • The protractor was invented by Joseph Huddart in 1801. It was a more complex form of protractor. 

let's sing Let's sing!

An acute angle is a little so small,
Right angle in the corner of a wall,
Obtuse angle at 2:50 in day-time,
Straight angle in a straw in soda-lime!
So many angles all around, even in a mime!

let's do it Let's do it!

Model and show how to use a protractor correctly. Ask your child to then use the protractor to measure and identify angles, basis their measurement.

related math vocabulary Related math vocabulary

Acute Angle, Right Angle, Obtuse Angle, Straight Angle
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