A decagon has sides.

In triangle $ABC, \angle A=\angle B=30°, AC=4 centimetres$. What is the length of $BC$?

In the figure, $\angle B=90°, \angle C=44°$

What is the measure of $\angle A$?

Perimeter of the rectangle in the figure is $36 centimetres$. $AC=\sqrt{164} centimetres.$ What is $AB+BC$? 

Perimeter of the rectangle in the figure is $36 centimetres$. $AC=\sqrt{164} centimetres.$ Find length of $AB$.

If the interior angle of a regularpolygon is $108°$, then it is a-

1. Octagon

2. Hexagon

3. Pentagon

4. Tetragon 

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

A polygon having $5$ sides is called a _____.

Examine the given figure and explain whether it is a polygon or not. (Yes/No)

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

Draw a hexagon of equal sides and unequal angles.

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

Name the polygon.

Make two more examples of this polygon.

Examine the given figure and check if it is a polygon. Write Yes/No.

Is an equilateral triangle a regular polygon? Write yes or no.