A and [blank_start]B[blank_end] are angles on a straight line.
B and C are [blank_start]vertically opposite[blank_end] angles.
[blank_start]C[blank_end] and G are corresponding angles on parallel lines.
Another pair of corresponding angles is [blank_start]F[blank_end] and B.
There are two pairs of co-interior angles - C and [blank_start]E[blank_end] as well as [blank_start]D[blank_end] and F
C and F are [blank_start]alternate[blank_end] angles on parallel lines as are D and E.