Name of the quadrilateral.

     

Name of the following quadrilateral.

Identify Isosceles triangle is a regular polygon or not ( Write yes or No).

Identify the regular polygons out of the following.

A square.

Identify Rectangle is a regular polygon or not.  ( Write yes/no)

Identify Parallelogram is a regular polygon or not. ( Write yes or No)

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