The area (in cm2) of biggest circle that could be drawn in a square of side 18 cm is :
Answer & explanation
Correct answer: option 2
We know that the area of a circle = πr2
The length of side = 18
The radius of the circle = \(\frac{ diameter }{2}\) = \(\frac{ 18 }{2}\) = 9cm
The area of the biggest circle that can be drawn inside a square = π × r2 = π × (9)2 = 81π