They are simply called opposite angles.
When 2 lines intersect, 4 angles are formed. The angles that are directly opposite to each other are called opposite angles.
Such angles are called vertically opposite angles.
Vertical angles.
vertical angles
They are simply called opposite angles.
Congruent
When 2 lines intersect, 4 angles are formed. The angles that are directly opposite to each other are called opposite angles.
Such angles are called vertically opposite angles.
Vertical angles.
vertical angles
vertical angles
An isosceles triangle
parallelogram
opposite or vertical angles
When two lines intersect, the angles across from each other are called vertically opposite angles, or just opposite angles. Opposite angles are equal to one another. See 'related links' below.
They're just called opposite angles, and they are congruent, or their measures are equal.