That's the formula for the area of a circle.
In math terms, pi, means 3.14, which is a everlasting decimal, that is just rounded to make your math easier. So pi, means 3.14 in math terms.
we use open circle
The length of a straight line from the centre of a circle to the edge of the circle.
The radius of a circle that is 10 centimeter would be 3.18. This is taught in 3rd grade math.
it means it is close
If you are talking about a graph, a solid circle means that point, say (3,4), is included, and an open circle it is not included
It is the set of all point INSIDE the circle but not points on the circumference.
Basically, the circumference of a circle is the perimeter of the circle.
the whispering eye
The perimeter of a circle is its circumference.
Something to do with being part of a circle.
The middle. Such as the center of a circle or triangle.
the center in Math means that all the points on the outside of the circle go to the center of the cirlce
It is in a diameter of a circle, which is bassicly means the length of a circle, right through the middle.
The length of the longest straight path inside a circle.
Circumference is like the perimeter of a circle.