Jacilore, I think your diagram is wrong. The well-defined triangle is made by all the gear hitting the ground at the start of the three heavy black lines, the skid marks.
The straight black line is the nosewheel and the two twin curving skid marks are the main gear. The nosewheel track is straight and the main gear drifts first left and then right.
See xkoote’s illustration in Post 1023.