Lines and Angle...

Example for a pair of parallel lines

Supplement angle of

In the figure, $$\displaystyle PQ\parallel ST,\angle PQR={ 100 }^{ o }$$, and $$\displaystyle \angle RST={ 110 }^{ o }$$. Then $$\displaystyle \angle QRS$$ is equal to

$$\displaystyle 170^{0}$$ is an example of-

Which of the following are acute angles?

An angle that is $$\displaystyle  { 1 }^{ o }$$ less than right angle is:

Range of an obtuse angle is:

Two adjacent angles whose sum is $$\displaystyle 180^{0}$$ is called

Which of the following is obtuse angle?

What is the range of reflex angle?