Basics of Lines and Angles

If the incentre of an equilateral triangle lies inside the triangle and its radius is $3 \mathrm{cm}$, then the side of the equilateral triangle is:

Identify the obtuse angles from the following figures.

Is the following triangle acute?

The angle between two perpendicular line is:

It is given that $\angle XYZ=54°$ and $XY$ is produced to a point $P$. Draw a figure from the given information. If ray $YQ$ bisects $\angle ZYP$, find $\angle XYQ$ and reflex $\angle QYP$.

The below angle is smaller or larger than $90°$ ?

The below angle is smaller or larger than $90°$ ?

The below angle is smaller or larger than $90°$ ?

The below angle is smaller or larger than $90°$ ?

The below angle is smaller or larger than $90°$ ?

The below angle is smaller or larger than $90°$ ?

It is given that $\angle XYZ=64°$ and $XY$ is produced to a point $P$. Draw a figure from the given information. If ray $YQ$ bisects $\angle ZYP$, find $\angle XYQ$ and reflex $\angle QYP$.

If $ABC$ is a straight line then value of $x$, in the given diagram will be 

When _____ rays intersect at a point, they form an angle.

Name the angle marked in the diagram.

Name the angle marked in the diagram.

A _____ has no length and breadth.

How many right angles make a complete angle?

Which of the following objects are perpendicular to the floor?

Choose the perpendicular line in the following.