What is linear pair?

In the given figure, find the value of $\mathrm{\angle }\mathrm{EOD}$.

The angle opposite to $\angle \mathrm{AOC}$ is $\angle$_____. $\left[\mathrm{BOC}/\mathrm{DOB}/\mathrm{AOD}\right]$

In an experiment using prism a beam of light is made to incident on side of the prism at an angle $45°$ (Angle between the perpendicular to the side $AC$and the ray of light). The light after refraction emerges at an angle, $55°$ (Angle between the perpendicular to side $AB$ and the merging light)  . The angle of prism is $60°$. 

The angle of deviation of light (marked in the figure, $d$) is _____ $°$

A ray stands on a line, then the sum of the two adjacent angles so formed is _____$°$.

The figure below shows the refraction of light as it enters from one medium to another. The angle of incidence, $i=30°$. The ray of light deviates by an angle $10°$.

The angle of refraction, $r=$_____ $°$ 

In figure, if $\mathrm{AB}\parallel \mathrm{CD}, \mathrm{CD}\parallel \mathrm{EF}$ and $y:z=4:5,$ then find the value of $x.$

The angle opposite to $\angle \mathrm{AOD}$ is $\angle$_____ .

If the sum of two adjacent angles is $180°$, then the _____ arms of the two angles are opposite rays. (uncommon/common)

If one angle of a linear pair is acute, then its other angle will be _____.

In the following figure, if $\mathrm{AB}\parallel \mathrm{CD}\parallel \mathrm{EF}$, then $\mathrm{PQ}\parallel \mathrm{RS}, \angle \mathrm{CQP}=60°$ and $\mathrm{RQD}=25°,$ then reflex $\angle \mathrm{QRS}$ is equal: