A circle is a 2 dimensional shape; it has a length and a height (the same, essentially), but no width. Since a circle has no width (or "depth"), it cannot exist in real life (only drawn on paper). (Even if you cut out the circle drawn on the paper, it would still have the width of the paper as a dimension, which would make it not a circle, by definition.)
There are some "cylindrical" objects in real life (which have a length, height and depth, so are 3D) but these are not the same as "circles"(cylindrical objects are allowed to have a width/depth, but circles cannot by definition). Examples of cylindrical objects include sellotape reels, wheels and other objects that have 2 circular faces and a curved surface in between.
The similar to a circle is a sphere - a sphere is an object where if lots of cross sections were taken, the cross section would be circular. Examples are Oranges, flowers, tomatoes, apples and balls.
A circle graph is a pie chart
a real life example of an octagon is a stop sign.
A pennant is a real life example of an isosceles triangle.
circular tunnel
It is equal to 2 r or D, where r= radius and D = diameter of the circle.
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Real life is a real life example!
a Television is a real life example of a Cube A dice is a real life example of a cube
A circle graph is a pie chart
a real life example of an octagon is a stop sign.
A real life example of a cliff are the white cliffs of Dover.
A real life example is the chloroplasts found in plant cells.
A pennant is a real life example of an isosceles triangle.
A rainbow is an example of an arc shape, as is any object or drawing that has a curve conforming to a section of the the circumference of a circle.
I real life example of a vertex would be a corner of an object like a box.
what is a real life example of limited government
Cytpolasm is an example of cytoplasm in real life: it does exist.