Which figure is formed by three non-collinear points?

The following table shows points on a number line and their coordinates. Decide whether the pair of segments given below the table are congruent or not.

seg $DE$ and seg $AB.$

The following table shows points on a number line and their coordinates. Decide whether the pair of segments given below the table are congruent or not.

seg $BC$ and seg $AD.$

The following table shows points on a number line and their co-ordinates. Decide whether the pair of segments given below the table are congruent or not.

seg $BE$ and seg $AD.$

Point $M$ is the midpoint of segment$AB$. If $AB=8$, then the length of $AM$ is $k$ units. Find the value of $k$.

Point $P$ is the midpoint of segment $CD$. If$CP=2.5$ and $l\left(CD\right)=k$ units, find the value of $k$.

If $AB=5 \mathrm{cm}$, $BP=2 \mathrm{cm}$ and $AP=3.4 \mathrm{cm}$, compare the segments.

Write the name of the opposite ray of ray $RP.$  

Write the intersection set of ray $PQ$ and ray $RP.$