What is the use of set-squares?

Dear Student!

Here is the answer to your query.

The set squares are two triangular instruments. One of the instruments contains angles 60°, 90° and 30° while the other contains angles 45°, 90°, and 45°.

The set squares are used to draw perpendicular parallel lines and angles like 30°, 45° and 60°.

Cheers!