R yer ies in yer toes so em be 50 m abuv the plaens belo????? yu hav a rite triangel with hite=50 & the small angel=20 deg, so yuze tan(20 deg)=0.36397023426620234=hite/base (wide) so base=hite/0.36397=50/.36397...or 50*2.74747741945464 =137.373870972732 Other triangel hav 18deg tan(18)=0.3249196962329063 distans=50/0.3249... or 50*3.077683537175313 =153.88417685876564 so up tu yu tu subtrakt...153.884 -137.374