Yes, they are.
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.
It is also a right angle Supplement = 180 - angle = 180-90 = 90 = right angle
Supplementary Congruency Theorem
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.
The hypotenuse angle theorem, also known as the HA theorem, states that 'if the hypotenuse and an acute angle of one right triangle are congruent to the hypotenuse and an acute angle of another right triangle, then the two triangles are congruent.'