Question

The angle that is common to the two different types of set squares is

• A. ${90}^{\circ }$
• B. ${60}^{\circ }$
• C. ${30}^{\circ }$

Answer 1

The correct option is A ${90}^{\circ }$

The two commonly used set squares are the 30-60-90 set square and the 45-45-90 set square.
Thus, the angle that is common to both the set squares is ${90}^{\circ }$.