Sudha is trying to fit a bed into a corner of a room. She knows that the walls and the floor of the room are perfectly straight. What is the measure of the angle of a corner of the room?

• A.  \[{{0}^{o}}\]                                  
• B.  \[{{90}^{o}}\]           
• C.  \[{{60}^{o}}\]                                
• D.  \[{{120}^{o}}\]