Measure angles with a protractor

Key Notes :

Line up one ray with 0°. Read the angle measurement where the other ray crosses the protractor.

Learn with an example

➡️ What is the measurement of this angle?

______ °

  • One ray is lined up with 0°. Follow the other ray to find the angle measurement.
  • This angle measures 150°.

➡️ What is the measurement of this angle?

___ °

  • One ray is lined up with 0° on the inside ring, which is the same as 180° on the outside ring. Read the angle measurement on the inner ring where the other ray crosses the protractor.
  • This angle measures 10°.

➡️ What is the measurement of this angle?

____°

  • One ray is lined up with 0° on the inside ring, which is the same as 180° on the outside ring. Read the angle measurement on the inner ring where the other ray crosses the protractor.
  • This angle measures 175°.

Let’s practice!🖊️