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Find an area, 3 meters wide above, 2 meters high, 4.5 meters wide at the bottom, how to calculate
（3+4.5）×2÷2=7.5
Isn't this a trapezoid?
3 meters long, 3 meters wide, 2 meters high steps to carpet how to calculate the area
3 * 3 + 3 * 2 = 15 square meters
3 * 3 is the area of the carpet facing up, and 3 * 2 is the area of the side
Dig a swimming pool that is 50 meters long, 30 meters wide and 2 meters deep. What's the floor area of this swimming pool? If tiles are pasted around the swimming pool
How many square bricks are needed at least?
Floor area = 30 * 50 = 1500 square meters
Number of tiles = (2 * 50 * 2 + 2 * 30 * 2) / (0.5 * 0.5) = 1280
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