You take out your ruler and measure it.
The radius of a circle is half of its diameter
A congruent figure is identical to another figure. Example would be like a circle with the radius of 12 meters, then the congruent figure would have to be a circle with a 12 meter radius.
The area of any circle = pi*radius2
pi times radius squared. :)
Figure out its radius and multiply it by pi or 3.14.
The radius of a circle is half of its diameter
When you try to figure out an area of a circle, you square the radius, then multiply it by pi to get the area of a circle. A radius square is radius x radius, or radius squared.
A congruent figure is identical to another figure. Example would be like a circle with the radius of 12 meters, then the congruent figure would have to be a circle with a 12 meter radius.
Pi times the radius of the circle squared = area And diameter is simply the radius x 2, since the radius is half the length of the circle.
You can divide the diameter by two.
The area of any circle = pi*radius2
pi times radius squared. :)
Figure out the square root
Figure out its radius and multiply it by pi or 3.14.
If the figure is truly a circle, then the circumference is (Radius) x (2 pi) .
2 times pi times radius
The radius of a circle is from the middle to the edge, or half the diameter. The circumference is like the perimeter of the circle, and the formula is pi times the diameter.