Hemisphere is the exact half of a sphere. When a plane cuts across a sphere at its center, it forms two hemispheres. Surface area of a hemisphere of radius r is given by 2pr2. Volume of a hemisphere of radius r is given by 2/3pr3.
Falling dreams also often reflect a sense of failure or inferiority in some circumstance or situation. It may be the fear of failing in your job/school, loss of status, or failure in love. You feel shameful and a lost sense of self-esteem You are unable to keep up with the status quo and feel that you don't measure up.
Traditionally, it was thought that dreaming that you did not have teeth, represent malnutrition which may be applicable to some dreamers. A scriptural interpretation for bad or falling teeth indicate that you are putting your faith, trust, and beliefs in what man thinks rather than in the word of God.