Telangana Board Solutions for Chapter: Lines and Angles, Exercise 15: Exercise - 7

Draw two lines $\overleftrightarrow{AB}$ and $\overleftrightarrow{CD}$ such that they intersect at point $\text{'}O\text{'}$.
Trace the figure given below on a tracing paper. Place the traced figure over the figure given below and rotate it such that $\angle BOD$ coincides with $\angle AOC$.
Observe the angles $\angle AOD, \angle AOC, \angle BOC \mathrm{and} \angle BOD$.

The sum of interior angles on the same side of transversal are supplementary then the lines are _____.

If two lines intersects each other, then the number of common points they have _____.

In adjacent figure, the lines $l$ and, $m$ are parallel and $n$ is transversal. 

If $\angle 4=100°$, then $\angle 8=$_____$°$.

Find the measures of $x, y$ and $z$ of the following figure, where l $\parallel$BC.

$\mathrm{ABCD}$ is a quadrilateral in which $AB\parallel DC \mathrm{and} AD\parallel BC$. Find $\angle b,\angle c \mathrm{and} \angle d$.

In a given Figure, $l$ and $m$ are intersected by a transversal $n$. Is $l \parallel m$.

Find $\angle a, \angle b, \angle c, \angle d \mathrm{and} \angle e$ in the figure? Give reasons.

Note: Two arrow marks pointing same direction are parallel to each other.