For my maths I learned to explore and describe a locus formed in practical situations.
In Mrs. Harrison's kindergarten class, children make handprints in a round clay mould for their parents. The mould has a radius of 4 centimetres. What is the mould's diameter?
These are the formulars to work out the answers.
C = 2πr C=πd
A = πr2
So to work this out: The radius is half of the diameter so, times the radius by 2 and you have the answer so 4 x 2 = 8 so 8 is the answer