Find the area of the blue shaded portion for the given figure below.

The three sides of a triangle are $15 cm, 36 cm, and 39 cm$ long. A small triangle is formed by joining the mid points of the three sides of this triangle. The area of small triangle will be_____ $c{m}^2$  

If the area of a circle is $9\pi$ sq.cm, then its circumference is:

1. $9$ cm
2. $6\pi$ cm
3. $3\pi$ cm
4. $6$ cm

A wire when bent in the form of a square encloses an area of $484 sq. cm$. If the same wire is bent in the form of a circle, what is the area enclosed by it?

The perimeter and the breadth of a rectangle are $52 cm$ and $12 cm$ respectively. Find its area in $c{m}^2$.

What is the area of this trapezoidal garden (All measurements are in cm)? 

1. $60$ sq.cm
2. $180$ sq.cm
3. $210$ sq.cm 
4. $240$ sq.cm

A semi - circle of diameter $1$ unit sits at the top of a semi-circle of diameter $2$ units. The shaded region inside the smaller semi-circle but outside the larger semi-circle is called a lune . The area of the lune is -