Yes.
Yes, it is.
Yes, it is. Circles that are in the same plane and having the same center are called congruent circles.
it depends whether the area of the circles ontop are the same (pie x diameter) if so, yes. if not, no. 64:27 .
If ll the angles of one triangle are the same as the angles of another triangle they are similar. Rotation is always allowed and mirroring often can be allowed.
Squares and circles are always similar.
Circles are congruent when they have the same radius and they are similar when their radii are different in lengths.
Circles and all regular polygons.
They can b different sizes
No. There are big ones, medium ones, and little bitty ones.But all circles are similar.
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
Yes. Both circles and ovals have no sides.
Because all circles are similar.
A square of identical shape but not size is similar. For example, a square is always a square, whether big or small. Or, a box with 4 sides with exactly the same top and bottom will be similar, but these similar or identical boxes can be tiny....or huge. A circle will be similar to other circles, but size could differ.
Yes.
No. They can me different sizes. For a shape to be congruent, they need to me same size and same shape.
Yes