PQ3-PQ1-line crossing P1-P2-line

PQ3-PQ1-line crossing P1-P2-line at ...

PQ3-1-P1-2

29.971615403999035, 31.125965864949

31,125965864949 29,971615403999035

https://goo.gl/maps/tDzpy7eirJWVjZz39

Angle between PQ3-PQ1-line and P1-P2-line:

90,339 - 43,352 = 46,987 angle-360-system