Question 470580
The given area equation: {{{A = pi*r^2}}}
gives the relationship between the area and radius of a circle.
It is a direct relationship so as radius increases, so does the area.
To find a value for A (area) you need a value for r (radius), then substitute it in.
Given: radius = 7, pi = 3.14
Substitute these into {{{A = pi*r^2}}}
{{{A = (3.14)*(7^2)}}}
Do the multiplication
{{{A = (3.14)*(49)}}}
{{{A = 153.86}}}
Therefore the area of a circle with radius of 7 cm. is 153.86 sq.cm.