Which triangle must be a right triangle and why?
The image of AABC after a reflection across EG IS AA'B'C'.
B
B
AA'B'C' is right because it is the image of AABC.
O AADC is right because AA' intersects AC at A.
ABCC' is right because B lies of the line of reflectic
ABGC is right because ECI CC'.
A
(F Do
D
A
С"
с