There are 4 types of angles and they are:-
acute angle: greater than 0 but less than 90 degrees
right angle: 90 degrees
obtuse angle: greater than 90 but less than 180 degees
reflex angle: greater than 180 but less than 360 degrees
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Do you mean "two-dimensional right angles?" If so, then each side of a cube is a square and so has four right angles.
When 2 lines intersect, 4 angles are formed. The angles that are directly opposite to each other are called opposite angles.
right angles are perpendicular lines that intercept each other at right angles which is 90 degrees
There are different properties for each of the four basic operations. If you have to identify one, you just have to name it.
When two angles are opposite each other. For example in an "X" the two side openings are vertical and the bottom and top angles are vertical