Measuring angles

When measuring angles, make sure that the centre of the protractor is over the vertex (corner) of the angle and that the base line of the protractor is along one of the lines of the angle.

Question

Use the protractor to measure the following angle:

Reveal answer

\[40 ^\circ \]

Question

Use the protractor to measure the following angle:

Reveal answer

\[70 ^\circ \]

Question

Use the protractor to measure the following angle:

Reveal answer

\[{135}^\circ\]

Question

Use the protractor to measure the following reflex angle:

Reveal answer

The reflex angle is:

\[{360}^\circ - {120}^\circ = {240}^\circ\]