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Yes they are. In a 2-dimensional plane, a circle is completely defined by the location of its centre and its radius. The first of these is irrelevant for similarity. The second, its radius is also the circle's only scale factor. And since similarity permits changes in the scale, a circle is not changed by altering its scale factor. Consequently all circles are similar.
What else can I help you with?
Why does Pi work for all circles?
Because all circles are similar.
If Two different circles have same circumference?
Then they are similar.
Which figures are always similar in geometry?
Circles and all regular polygons.
What solid figure is a set of your parallel cross sections are circles that are similar but not congruent?
A sphere is.
The top side and front views of a solid figure are similar circles what shape is the solid?
A sphere?
Are all circles congruent?
No. There are big ones, medium ones, and little bitty ones.But all circles are similar.
Are circles sometimes never or always similar?
Circles are congruent when they have the same radius and they are similar when their radii are different in lengths.
Are ovals and circles similar?
Yes. Both circles and ovals have no sides.
Why does Pi work for all circles?
Because all circles are similar.
What shape is always similar?
Squares and circles are always similar.
Are circles always similar?
No They Are Not * * * * * Yes, they are.
If Two different circles have same circumference?
Then they are similar.
Which figures are always similar in geometry?
Circles and all regular polygons.
What solid figure is a set of your parallel cross sections are circles that are similar but not congruent?
A sphere is.
Are all circles 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
The top side and front views of a solid figure are similar circles what shape is the solid?
A sphere?
Are two circles sometimes always or never similar to each other?
They can b different sizes
