4. Four mark example problems III

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

 

 

Answer:

 

Area of the key chain $=$  $cm^2$.