Colours on the flag
This task is about working out the area and perimeter.
The figure below shows a flag. It has three equalsized rectangular panels of blue, gold, and red. The gold panel has a black circle in the centre of it. 

Useful Formula
a =r^{2} where: 
a) 
What would be the length of stitching required to go right around the flag?
__________ m

b) 
What is the area of the blue panel? __________ m^{2} 
c) 
What is the area of the black circle, if it has a diameter of 5.0 m? __________ m^{2} 
d) 
What is the area of gold cloth remaining in the centre panel, if the black circle was cut from it?
__________ m^{2}
