You can use a protractor to measure and draw angles. Line up the bottom edge of the protractor with one leg of the angle.

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### To measure angles with a protractor first place the center point along the bottom edge of the protractor over the vertex of the angle you re measuring.

**How to use a protractor**. Drag the protractor and rotate it using arrow keys. Be careful which angle you read from the protractor. Line up the horizontal line on the baseline of your protractor placing the center of your protractor over the vertex.

Step 1 place the protractor on the vertex of the base line and draw a dotted line for 180. Line up the bottom edge of the protractor with one leg of the angle. Step 2 flip the paper keep the protractor on the vertex and measure from the dotted line to the angle line.

Look where the diagonal line crosses the protractor to determine the number of degrees in the acute angle. Learn how to correctly line up and read a protractor to measure different types of angles. You can use a protractor to measure and draw angles.

Now add the acquired angle to 180. Tenmarks is a standards based program. Students learn to use a protractor to measure angles.

To measure angles with a protractor first place the center point along the bottom edge of the protractor over the vertex of the angle you re measuring. Place your protractor on the straight line to measure the acute angle. If you get them all correct they will add up to 180.

How to use a protractor. How to measure angles exceeding 180 using a semicircular protractor.