Give an example of intersecting lines and parallel lines from your surroundings.

In the above figure (not to scale), $AB\parallel DE$ and $EC\parallel GF$. If $\angle EGF=100°$ and $\angle ECF=40°$, then find:

$\angle GFD=$_____ degrees.

In Figure, if $AB\left|\right|CD$, the value of $x$is

If $\mathrm{l}$ is a transversal of $\mathrm{P} \mathrm{and} \mathrm{Q}$, a pair of corresponding angles is equal, then the lines $\mathrm{P} \mathrm{and} \mathrm{Q}$ are _____.

In the above figure (not to scale), $AB\parallel DE$ and $EC\parallel GF$. If $\angle EGF=100°$ and $\angle ECF=40°$, then find:

$\angle ABC=$_____ degrees.

Choose the pair of parallel lines in the following.

In the above figure (not to scale), $AB\parallel DE$ and $EC\parallel GF$. If $\angle EGF=100°$ and $\angle ECF=40°$, then find:

$\angle GDF=$_____ degrees.

Mohit got an assignment where he had to explain the types of angles formed by a pair of parallel lines.

He completed the assignment but when his teacher checked he saw mistakes. Identify the correct option pointing out the mistake in the parts ( i to iv).$$

A line which intersects two or more lines at distinct points is called _____. 

In the above figure, $\overline{AB}$ and $\overline{FE}$ are intersected by a transversal, such that $\angle BGK=\angle EHL.$ Then $\overline{AB}$ is _____ to $\overline{EF.}$

In the given figure, $\mathrm{AB} \parallel \mathrm{DE}$.
Find $\angle \mathrm{x}$.

In the figure (not drawn to scale), $AB$ is parallel to $CD$and $\angle ECD$ is a right angle. Find $\angle y.$