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.
Another very common dream is the dream where you are falling from a cliff, a building, a rooftop, an airplane or from some higher ground. Contrary to a popular myth, you will not actually die if you do not wake up before you hit the ground from the fall. To understand your falling dream, you need to look to what is going on in your waking life. Falling suggests loss of control: When you fall, you have no control and have nothing to hold on to. Thus your falling dream is analogous to a situation in your waking life where you are lacking or losing control. You are feeling overwhelmed, perhaps in school, in your work environment, in your home life or maybe in your personal relationship.