How many surfaces of blackboard
area of dish end
(2/3)*base*height
6(pi)l2, where l = length of side
The area of a sphere is 4 (pi) (radius)2. The area of 1/2 of the sphere is 2 (pi) (radius)2. If you want to add in the flat end of the hemisphere, that makes the total surface area 3 (pi) (radius)2.
Formula for calculating the area of a hemisphere... Area = (4 x pi x r2) / 2
area of dish end
The answer will depend on what information you have.
Calculating volume and surface area.
2(l*w)+2(w*h)+2(l*h)=surface area
(2/3)*base*height
http://wiki.answers.com/Q/What_is_the_mathematical_formula_for_calculating_a_surface_area_for_a_building"
the formula for calculating the surface area of an oval is A = Pi * a * b where a & b are the semimajor(half the long) and semiminor(half the short) axes
6(pi)l2, where l = length of side
SA = 4 π r2 (SA is surface area = 4 (X) pi(3.142) (X) R(adius) squared
It depends on how many sides are part of the "opening".
A = 2 x pi x r (r + h)
Surface area was not invented as its a natural phenomena. However, surface area can be derived mathematically from calculating how much of an object, molecule, and so on are exposed. The contact surface of a flat square of 1-centimeter sides would have a surface area of 1-square cm for example. Understanding the implications of surface area is critical to scientific and engineering disciplines.