August 16th, 2017, 12:47 AM  #1 
Newbie Joined: Aug 2017 From: Singapore Posts: 2 Thanks: 0  Help me!!!
Help me solve this question!!!

August 16th, 2017, 12:51 AM  #2 
Newbie Joined: Aug 2017 From: Singapore Posts: 2 Thanks: 0 
There are seven circles with radius 1, what's the area of the shaded area.

August 16th, 2017, 07:45 AM  #3 
Math Team Joined: Jul 2013 From: काठमाडौं, नेपाल Posts: 872 Thanks: 60 Math Focus: सामान्य गणित 
You can get two full circles if you arrange the shaded parts, solve it by observation. $\displaystyle answer = 2\times \pi r^{2} = 2 \pi$ 