Using the dimensions you're given and those that you can calculate . . .
-- Calculate and write down the area of each face of the pyramid.
-- Then add up all of the individual areas.
-- The sum is the surface area of the pyramid.
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The formula to find the surface area of a parallelogram is Base*Height.
surface area of glass plate
1. Find the surface area of the whole cylinder 2. Find the area of one of the two circles on either end of the cylinder 3. Multiply the circle's area by two and subtract their area from the total surface area 4. Now you have the surface area of an unclosed cylinder!
Surface area = length*width in square units
2*area of triangular faces + perimeter of triangle*length of prism (not prisim).