congruent
eyeballs
It's not a circle if it's radius of 5 degrees. If it's 5 cm radius, then 12 circles.
Yes, all circles are similer, they all have 1 line, all the same shape, any quarter of a circle will always be 25%, but it the line is bigger they still have differances and similarities, e.g a circle can have a radius of 25cm while another can have a radius of 93984389569349billion miles
Circles in the same plane with the same center are concentric circles.
2 circles can be congruent. The have to have the same radius.
Yes, it is true. Any circles with the same radius will have the same circumference as well.
congruent circles
The same radius.
congruent
No. You can only define a circle by radius, diameter, area, perimeter. Concentric circles have the same centre, therefore, if they were the same circles with the same radius, then they would all lie on top of each other and be effectively one circle.
No. Concentric circles have the same centre but not [usually] the same radius. Congruent circles have the same radius, but not [usually] the same centre. If you have two concentric congruent circles one will be exactly on top of the other.
They are said to be concentric circles.
If you create third circle with radius 2, then all the points on that circle would be equidistant form both circles. So the answer is a circle with radius 2.
Circles are congruent when they have the same radius and they are similar when their radii are different in lengths.
If the circles have the same radius then an infinite number, and if they do not, then none.
mandorla or vesica piscis (if they have the same radius)