A triangle can be rotated through any angle of your choice!
An equilateral triangle has rotational symmetry of order 3, which means that a rotation of 120 degrees (or multiples) will bring it back to the same orientation. All other triangles have rotational symmetry of order 1: that is, you have to rotate them a full circle (360 deg) before they look the same.
60 degrees, 120 degrees
120
The angle of rotation for a regular polygon with 7 sides isImmersive Reader
If one angle is a right angle, it is a right triangle. If one angle is an obtuse angle, it is an obtuse triangle. If there are no right nor obtuse angle then it is an acute triangle.
A triangle with 1 right angle is a right angle triangle.
No.
60 degrees, 120 degrees
120
40
The angle of rotation for a regular polygon with 7 sides isImmersive Reader
Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!Yes. That is why it is called a right angle triangle!
A right angle triangle
A right angle triangle.
Rotation preserves shape - therefore the angle before the rotation equals the angle after the rotation.
ABC angle is an angle,not a triangle!
The centre of rotation, the angle of rotation and, unless the angle is 180 degrees, the direction of rotation.
If one angle is a right angle, it is a right triangle. If one angle is an obtuse angle, it is an obtuse triangle. If there are no right nor obtuse angle then it is an acute triangle.