Just call them "congruent angles".
They are co-terminal angles.
It is not an axiom, but a theorem.
In the context of two parallel lines and an intercept, they are called interior angles.
It is called an isosceles triangle.
Just call them "congruent angles".
They are supplementary angles.
Right angles.
a line or supplementary angles.
A bisected angle.
Every triangle has at least three angles.
They are co-terminal angles.
a complementary angle
They are complementary
It is not an axiom, but a theorem.
In the context of two parallel lines and an intercept, they are called interior angles.
It is called an isosceles triangle.