Much of the cost of cooling your home can be saved by passive cooling techniques which don't require expensive retrofits or professional installations.Here are suggestions for free, or low-cost, ways to cool your home with less impact on the environment and your energy bill.ir conditioners can use up to 1/6th of U.S. electricity and, on hot summer days, consume 43% of the U.S. peak power load. According to the US Department of Energy, heating and cooling systems emit over a half billion tons of carbon dioxide into the atmosphere each year, adding to global warming.
A rectangular pyramid has 5 faces. How many triangles and how many rectangles form a rectangular pyramid?
A rectangular pyramid has 5 vertices, 5 faces, and 8 edges. A rectangular pyramid has a rectangle for a base and triangle faces. Since the rectangle has four sides, there are four triangular faces. An edge is a line segment that connects any two sides. Each side of the rectangle connects to a triangle (4 edges), and there are connections between the trangles (4 edges). 4 + 4 = 8 edges.