NCERT Section

What is the measure of a right angle?

What is the measure of a straight angle?

If $\mathrm{m}\mathrm{\angle }\mathrm{A}=53°$ and $\mathrm{m}\mathrm{\angle }\mathrm{B}=35°$, then $\mathrm{m}\mathrm{\angle }\mathrm{A}>\mathrm{m}\mathrm{\angle }\mathrm{B}$.

The opposite sides of a rectangle are equal in length.

All the sides of a parallelogram are of equal length.

The opposite sides of a trapezium are parallel.

Give reasons for the following:
A rectangle can be thought of as a special parallelogram.

Give reasons for the following:
Square is also a parallelogram.