Nishanth has a key-chain which is in the form of an equilateral triangle and a semicircle attached to a square of side $5 \mathrm{cm}$ as shown in the given figure. Find its area. $(\pi =3.14, \sqrt{3}=1.732)$

A $3$ -fold invitation card is given with measures as in the below figure. Find its area.

Seenu wants to buy a floor mat for his kitchen at home as given figure. If the cost of the mat is $₹ 20$ per square foot, what will be the cost of the entire mat $?$

Find the area of the shaded region in the square of side $10 \mathrm{cm}$ as given figure. $\left(\pi =\frac{22}{7}\right)$

Find the area of an irregular polygon field whose measures are as given in the figure.