Given: Trapezoid RIAG with RI = RG = GA
m angel I = m angel NAG
Prove: angel T is approximately equal to angel N

Please provide reasonings for the following:

C. Line RG is Parallel to Line IA
D. Measure of angel TRG equals measure of angel I
H. measure of angel TGR equals measure of angel NGA
I. Triangle TGR is approximately equal to triangle NGA
J. Angel T is approximately equal to angel N