not all congruent angles are vertical angles. Vertical angles must share a vertex.
Vertical angles must be congruent so if they are complementary, they must be 45 degrees to be complementary.
No.
Equal angles.
Vertical, possibly!
Vertical angles must necessarily be congruent, however congruent angles do not necessarily have to be vertical angles. An example of congruent angles which are not vertical angles are the 3 interior angles of an equilateral triangle. These angles do not share the same vertex yet they are congruent.
Equal angles.
have the same vertex. be congruent.
Because if they werent, they would eventually form an angle.
they can be obtuse say ther are two lines intersecting two of the angles are acute (50degrees) that means the other pair must be obtuse 180-50=130 so the other two angles are obtuse with a measurement of 130degrees
Angles that are congruent and supplementary must be right angles.
The measurements of these two sets of vertical angles should add to 360. If two of the corresponding angles are 145, that means 290 degrees of that total 360 are taken up. 70 degrees is needed to make 360 (360 - 290 = 70). As the two acute angles must be equal, they are each 35 degrees.