G_CM_M4_fig1
Auxiliary lines added to trapeziums.
Related content
G_CM_M1_A1_...
G_CM_M1_A1_...
G_CM_M3_A1_...
G_CM_M3_A1_...
G_CM_M3_E1_...
G_CM_M3_E1_...
G_CM_M1_fig1
