Special Angles
Special Angles: Overview
This topic covers concepts, such as, Related Angles, Properties of Vertically Opposite Angles, Pair of Alternate Interior Angles of Transversal & Relation between Pairs of Alternate Interior Angles of Transversal of Parallel Lines etc.
Important Questions on Special Angles
The external bisector of in intersects the straight line through A and parallel to at the point D. If then measure of is equal to_______.

In the following fig, FD and AE are parallel to each other and , then is equal to

In the figure given, . If , what is the length of ?

Consider the following statements regarding vertically opposite angle:
. Vertically opposite angles share a common point.
. The point which is a common vertex of two vertically angles is also called the point of concurrency
. Vertical angles are a pair of adjacent angles
Which of the above statements is/ are not correct?

Which of the following statements is/are true for vertically opposite angles:
Vertical angles are always equal.
Vertical angles can be supplementary as well as complimentary.
Vertical angles are always adjacent.

If lines and intersect at point , such that and . Find .


Find the measurement of the angles from the given figure,
Here, . Find the value of .

Refer to the figure. Fill in the blank.
and _____ are vertical angles.

Find the measurement of the angles from the given figure,
Here, . Find the value of .

In the given figure, if , then the value of is


In the given figure, and . Then, angles and are respectively

In the given figure, and . Then, the values of and are respectively.


In the given figure, . The alternate interior angle to is

and are parallel lines cut by the transversal . Find the unknown angle marked in the following diagram.


If two lines intersect, the vertically opposite angle are

