Question

The angle of rotation needed to obtain a second trinomino from the first one in the given figure is _____.

• A. ${90}^{\circ }$
• B. ${180}^{\circ }$
• C. ${270}^{\circ }$
• D. ${360}^{\circ }$

Answer 1

The correct option is B ${180}^{\circ }$

When the first one in the given figure is rotated by ${90}^{\circ }$, the following figure is obtained.


Now, when the obtained figure is rotated by ${90}^{\circ }$, the required figure is obtained.


$\therefore$ The angle of rotation needed to obtain a second trinomino from the first one in the question given is
${90}^{\circ }$ + ${90}^{\circ }$ = ${180}^{\circ }$.