Yes, they are.
Yes, an angle and its supplement can be congruent, but only if the angle measures 90 degrees. In this case, both the angle and its supplement would be 90 degrees, making them congruent. For any angle other than 90 degrees, the angle and its supplement will always have different measures.
The Congruent Supplement Theorem states that if two angles are supplementary to the same angle (or to congruent angles), then those two angles are congruent to each other. In other words, if angle A and angle B are both supplementary to angle C, then angle A is congruent to angle B. This theorem is useful in proving relationships between angles in geometric proofs.
Supplementary Congruency Theorem
It is also a right angle Supplement = 180 - angle = 180-90 = 90 = right angle
if two angles are supplements of the same angle (or of congruent angles), then the two angles are congruent.
Another right angle.
No
The leg-angle congruence theorem says if one leg and an acute angle of one right triangle are congruent to one leg and an acute angle of another right triangle, then the two right triangles are congruent.
The supplement of an 80 degree angle is an 100 degree angle.
If the hypotenuse and an acute angle of a right triangle are congruent to the correspondingparts of another right triangle, then the triangles are congruent.
Yes.
An isosceles right triangle.Note:If it has a right angle, then it can't possibly have morethan 2 congruent sides.