make triangel inside serkel...points on serkel . . . probability 1 ange > 90deg....in reel life...zero . . . kauz av human naechuer . . . math-man mite argue for 50% bu yuze logik such as . . . 1. draw horizontal line kros serkel=base av triangel. . . . 2. selekt 1 point abuv it at point 3. . . . 3. then muev the BASE up & down tu vary triangel . . . yu kood muev base up kloes tu top point so angel theer almost 180 deg Wen base abuv serkel senter, top angel > 90 deg. . . . Thats the top half av serkel, so half av triangels hav 1 angel > 90 deg. . . . problem: reel folks dont du thangs like that