If two angles are complementary to each other, then each angle is :

In the given figure, $\angle \mathrm{a}$ is greater than one-sixth of right angle, then.

In the adjoining figure $\mathrm{AE}\Vert \mathrm{CD}$ and $\mathrm{BC}\Vert \mathrm{ED}$, then find $\mathrm{Y}$.

In a $∆\mathrm{ABC}$, a line $\mathrm{XY}$ parallel to $\mathrm{BC}$ intersects $\mathrm{AB}$ at $\mathrm{X}$ and $\mathrm{AC}$ at $\mathrm{Y}$:
If $\mathrm{BY}$ bisects $\angle \mathrm{XYC}$, then $\mathrm{m}\angle \mathrm{CBY}:\mathrm{m}\angle \mathrm{CYB}$ is :