five; they are: position, orientation, shape, and scale
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360 degrees.
There are infinitely many plane figures, not just five! A circle, ellipse, A triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, and on and on. And then there are mixed figures such as a semicircle, a segment of an ellipse. Not forgetting plane figures that have "random" boundaries.
A circle on it's own has 3 degrees of freedom. One being the radius/diameter of the circle and the remaining two being the X and Y coordinates of the midpoint.and.....I LIKE APPLES For futher inquiry Feature Degrees of freedom Circle 3 Line 4 Circular Arc 5 Ellipse 5 Elliptical Arc 7
There are 180 degrees in every plane triangle.
Two.