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2. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   An adult human foot is about 28 cm (11 in) long. The decimetre ( SI symbol: dm ) is a unit of length in the metric system equal to 10 −1 metres ( ⁠ 1 / 10 ⁠ m = 0.1 m ). To help compare different orders of magnitude , this section lists lengths between 10 centimeters and 100 centimeters (10 −1 meter and 1 meter).

3. Round table (furniture) - Wikipedia

   en.wikipedia.org/wiki/Round_table_(furniture)

   The idea stems from the Arthurian legend about the Knights of the Round Table in Camelot. Today, round tables are often used at conferences involving many parties. The most famous modern round table was the one used for talks between the Communist government and Solidarity in Poland in 1989; see: Polish Round Table Agreement. Hence, the term ...

4. Table (furniture) - Wikipedia

   en.wikipedia.org/wiki/Table_(furniture)

   Most tables are composed of a flat surface and one or more supports (legs). A table with a single, central foot is a pedestal table. Long tables often have extra legs for support. Dinner table and chairs. Table tops can be in virtually any shape, although rectangular, square, round (e.g. the round table), and oval tops are the

5. Foot (unit) - Wikipedia

   en.wikipedia.org/wiki/Foot_(unit)

   The Egyptian equivalent of the foot—a measure of four palms or 16 digits—was known as the djeser and has been reconstructed as about 30 cm (11.8 in). The Greek foot (πούς, pous) had a length of ⁠ 1 / 600 ⁠ of a stadion, [12] one stadion being about 181.2 m (594 ft); [13] therefore a foot was, at the time, about 302 mm (11.9 in). Its ...

6. Earth's circumference - Wikipedia

   en.wikipedia.org/wiki/Earth's_circumference

   Using the length of the rod and the length of the shadow as the legs of a triangle, he calculated the angle of the sun's rays. [10] This angle was about 7°, or 1/50th the circumference of a circle ; assuming the Earth to be perfectly spherical, he concluded that its circumference was 50 times the known distance from Alexandria to Syene (5,000 ...

7. Tree girth measurement - Wikipedia

   en.wikipedia.org/wiki/Tree_girth_measurement

   The Tule tree has a diameter of 38 feet 1.4 inches (1,161.8 cm) as measured by tape wrap, but because of its irregularity a cross-sectional wood area expressed as a circle gave an effective diameter of only 30 feet 9 inches (937 cm). The base of the tree was mapped in three dimensions using a frame mapping technique.