None.
You can rotate a circle by the smallest possible angle that you can think of and it will be an angle of symmetry. And then you can halve that angle of rotation and still have rotational symmetry. And you can halve that angle ...
it is a figure that rotates around aline of symmetry
the line of symmetry from the middle
If you can rotate (or turn) a figure around a center point by fewer than 360° and the figure appears unchanged, then the figure has rotation symmetry. The point around which you rotate is called the center of rotation, and the smallest angle you need to turn is called the angle of rotation. This figure has rotation symmetry of 72°, and the center of rotation is the center of the figure:
the distance from a point on either ray of the angle that is equidistance from the axis of symmetry is the line of symmetry. the line of symmetry dives the angle in half.
The least angle at which the figure may be rotated to coincide with itself is the angle of symmetry.
A right angle has one line of symmetry.
It is not possible to show anything using this browser, but the only line of symmetry is the bisector of the angle.
is a right angle that intersects and 3 lines of symmetry
In a triangle the smallest angle is always opposite the shortest side. It will always be an acute angle.
54 degrees
It is 1 degree after a right angle. A right angle is 90 degrees so the smallest obtuse angle is 91 degrees.
Yes. An isosceles triangle, for example, is symmetric about the bisector of its odd angle but has no rotational symmetry.