Simplify the formula. You now know enough to find the surface area of any rectangular prism. You can do it faster if you've learned some basic algebra. Start with our equation above: Area of a rectangular prism = lw + lw + wh + wh + lh + lh.
Check the Weather in Perissa, Santorini in September before you book your next holiday. This gives the best indication of the weather in September and includes figures for temperature, sunshine and rainfall. 1  25Â°C max day temperature.
Average Weather in September in Helsinki Finland. In Helsinki, the month of September is characterized by rapidly falling daily high temperatures, with daily highs decreasing by 9Â°F, from 63Â°F to 54Â°F over the course of the month, and rarely exceeding 70Â°F or dropping below 46Â°F.