krgua area with diameter 45 equal to 1590.384
where R is the radius of the circle
A circle (circle) is a geometric figure on a plane, all points of which are equidistant from a given point (the center of the circle).
Circle area formula 
where d is the diameter of the circle
where L is the circumferenceSolution:
S =
π·
d2
4
=
3.1415·
452
4
=
3.1415·
2025
4
=
3.1415·
506.25
=
1590.384
Answer: krgua area with diameter 45 equal to 1590.384