Question

A set square whose one angle is ${30}^{\circ }$ has two more angles equal to

• A. 30° and 60°
• B. 30° and 90°
• C. 60° and 90°
• D. 45° and 90°

Answer 1

The correct option is C 60° and 90°

There are two types of set squares :
1. ${90}^{\circ },{45}^{\circ },{45}^{\circ }$

2. ${90}^{\circ },{30}^{\circ },{60}^{\circ }$

Hence, if one angle is 30°, then the other two angle are 60° and 90°.