a walk 20 m towards north east . b walk towards east 8 m and then 12 m south . now calculate distance between a and b ?
its coming 30.4 m since 1 st triangle we get 18.31 and extra 12 so 18.31 + 12 = 30.31 = 30 m answer : a
add(12, sqrt(subtract(power(20, const_2), power(8, const_2))))