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  2. Geometric Shapes (Unicode block) - Wikipedia

    en.wikipedia.org/wiki/Geometric_Shapes_(Unicode...

    25A0 25B0 25C0 Symbol Name Symbol Name Symbol Name Last Hex# HTML Hex HTML Hex HTML Hex Dec Picture Dec Picture Dec Picture BLACK SQUARE: BLACK PARALLELOGRAM: : BLACK LEFT-POINTING TRIANGLE

  3. Skinny triangle - Wikipedia

    en.wikipedia.org/wiki/Skinny_triangle

    Fig. 1 Isosceles skinny triangle. In trigonometry, a skinny triangle is a triangle whose height is much greater than its base. The solution of such triangles can be greatly simplified by using the approximation that the sine of a small angle is equal to that angle in radians.

  4. File:Pascal's Triangle divisible by 4.svg - Wikipedia

    en.wikipedia.org/wiki/File:Pascal's_Triangle...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  5. Tetrahedron - Wikipedia

    en.wikipedia.org/wiki/Tetrahedron

    This gives two opposite edges (1,2) and (3,4) that are perpendicular but different lengths, and then the 4 isometries are 1, reflections (12) and (34) and the 180° rotation (12)(34). The symmetry group is C 2v, isomorphic to the Klein four-group V 4. A digonal disphenoid has Schläfli symbol { }∨{ }. C 2v C 2 [2] [2] + *22 22: 4 2 Phyllic ...

  6. Tetractys - Wikipedia

    en.wikipedia.org/wiki/Tetractys

    The tetractys. The tetractys (Greek: τετρακτύς), or tetrad, [1] or the tetractys of the decad [2] is a triangular figure consisting of ten points arranged in four rows: one, two, three, and four points in each row, which is the geometrical representation of the fourth triangular number.

  7. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The apparent triangles formed from the figures are 13 units wide and 5 units tall, so it appears that the area should be S = ⁠ 13×5 / 2 ⁠ = 32.5 units. However, the blue triangle has a ratio of 5:2 (=2.5), while the red triangle has the ratio 8:3 (≈2.667), so the apparent combined hypotenuse in each figure is actually bent. With the bent ...

  8. 4 Ways to Make a Small Room Look Bigger, According to ... - AOL

    www.aol.com/4-ways-small-room-look-142807797.html

    Everything from the paint color you use to how you arrange your furniture can effect how big or small your space looks. 4 Ways to Make a Small Room Look Bigger, According to Interior Designers ...

  9. Triangle - Wikipedia

    en.wikipedia.org/wiki/Triangle

    Triangles have many types based on the length of the sides and the angles. A triangle whose sides are all the same length is an equilateral triangle, [3] a triangle with two sides having the same length is an isosceles triangle, [4] [a] and a triangle with three different-length sides is a scalene triangle. [7]