Exercise

In a rhombus $\mathrm{ABCD}$, $\mathrm{AC}=\mathrm{AD}$. Find the value of $\angle B$.

If $\mathrm{PQRS}$ is a kite, then answer the following question.

 Is $\overline{RS}=\overline{RQ}$?

If $\mathrm{PQRS}$ is a kite, then answer the following question.

 Is $\overline{\mathrm{PS}}=\overline{\mathrm{PQ}}$?

If $\mathrm{PQRS}$ is a kite, then answer the following question.

 Can we say $\angle \mathrm{PMS}=\angle \mathrm{RMS}=90°$?

A quadrilateral with all equal angles and equal sides is called a _____.

A _____ is a kind of parallelogram.

A quadrilateral in which diagonals are not equal but bisect each other at $90°$ is called _____.

A quadrilateral with opposite sides (Only one pair) parallel is called _____.