Ruler & Protractor

1. Ruler

If you do not have a ruler here, try using a ruler on your smartphone.

The ruler can measure the length of things.

The length can be measured in inches, in centimeters (cm).

2. Protractor

If you do not have a protractor here, try the protractor with your smartphone.

The protractor can measure the angle of the object reflected by the camera.

Try various protractor apps and protractor apps.