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 \(=\)  \(cm^2\).