Squaring the circle: the areas of this square and this circle are both equal to Ï. In 1882, it was proven that this figure cannot be constructed in a finite number of steps with an idealized compass and straightedge.
Not to be confused with Cloud top. In aviation, ceiling is a measurement of the cloud base height relative to the ground. Ceiling is reported as part of the METAR (METeorological Aviation Report) used for flight planning by pilots worldwide. A ceiling listed as unlimited means either that the sky is mostly free of cloud cover, or that the cloud is high enough not to impede Visual Flight Rules (VFR) operation. In a METAR, the lowest BKN or OVC layer specifies the cloud ceiling.
Wood coffered ceiling â for one that type of design allows to show the natural beauty of wood. A full coffered ceiling system looks luxury and shows the refined taste of the homeowner. Coffered panels and wood trim â parts of the ceiling are covered with panels.You can opt for square panels, or a center oval or octagon. This type of design gives the opportunity to reduce the coffered ceiling cost and still look classy.he word has originated from ancient Greek word âkophinosâ, which means âbasket.â A coffered ceiling is a grid of squares or rectangles that is applied to the ceiling to imitate the effect of crisscrossing beams.