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Lesson 2: Measuring angles

# Constructing angles review

Review constructing angles with a protractor, then try constructing some of your own.

## Constructing angles

We can use a protractor to help us construct an angle of a given amount of degrees.
Example
Construct a ${65}^{\circ }$ angle.
To make a ${65}^{\circ }$ angle, we move the middle dot of the protractor to the vertex (where the $2$ rays connect) of the angle.
Next, we line up one of the rays on the ${0}^{\circ }$ line of the protractor.
We then move the other ray around until it is lined up with the ${65}^{\circ }$ measurement on the protractor.
The angle will look like this when the measurement is ${65}^{\circ }$. Note: The angle can be rotated in any direction, but the angle between the two rays must look like this.
Construct a ${40}^{\circ }$ angle.