Angle A = 100 , Angle C = 100 , Angle D =80
It went up 24c because 25% of 96c is 24c
Congruent means they are the same size
To prove the two triangles are congruent you would need to know the length of at least two of the sides. If two sides were not known you would need to know the length of one side and at least one of the unknown angles.
144 classes. each class is 10 minutes. 6X24= 144
