Measuring Angles Using a Protractor
Learn how to measure and draw angles accurately using a protractor. Explore different angle types and verify their measurements!
1. Place the protractor's center point at the angle's vertex. 2. Align the baseline with one arm of the angle. 3. Read the measurement where the other arm crosses the protractor scale.
Understanding Angles and Protractors
Angles are formed by two rays (arms) sharing a common endpoint (vertex):
- Acute angles: Less than 90°
- Right angles: Exactly 90° (forms an 'L' shape)
- Obtuse angles: Between 90° and 180°
- Straight angles: Exactly 180° (forms a straight line)
A protractor is a semicircular tool marked with degrees from 0° to 180°. The flat edge is called the baseline, and the center point must align with the angle's vertex for accurate measurement.
Angle measurement is essential in architecture, engineering, navigation, sports, art, and many other fields where precise angular relationships are important.
