2D
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2D shapes – Decagon
A decagon is a polygon that consists of ten sides and ten angles. The word “decagon” is derived from the Latin words “deca,” meaning ten, and “gonia,” meaning angle. It is classified as a regular polygon because all of its sides have equal lengths and all of its angles have equal measures. Properties of a…
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2D shapes – Nonagon
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2D shapes – Octagon
An octagon is a two-dimensional (2D) shape that consists of eight straight sides and eight angles. It belongs to the family of polygons, which are closed figures made up of straight lines. The prefix “octa-” means eight, which reflects the defining characteristic of an octagon. Key Features of an Octagon: Properties and Uses: Overall, an…
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2D shapes – Heptagon
The heptagon, also known as a seven-sided polygon, is a fascinating geometric shape that has intrigued mathematicians, artists, and architects throughout history. A heptagon is characterized by its seven straight sides and angles. Each interior angle of a regular heptagon measures approximately 128.57 degrees, making the sum of all interior angles equal to 900 degrees.…
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2D shapes – Hexagon
This delightful 2D shape has been capturing human imaginations for centuries with its mesmerizing symmetry and unique properties. From honeycombs to snowflakes, the hexagon has woven its hex-cellent magic throughout nature and human creations alike. Fascination with hexagons dates back to ancient times. Ancient civilizations like the Egyptians and Greeks were captivated by this shape…
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2D shapes – Pentagon
The pentagon is a five-sided polygon with five angles, and its sides are all the same length. If we let “s” represent the length of each side, we can use the following formulas to find some other important measurements of a regular pentagon: Here, “n” represents the number of sides in the polygon (in this…
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2D shapes – Oval/Ellipse
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2D shapes – rhombus
A rhombus is a four-sided flat shape (also known as a quadrilateral) with four equal-length sides. It is similar to a square, but its opposite angles are not necessarily 90 degrees. In a rhombus, the opposite sides are parallel to each other, and the diagonals (lines that connect opposite corners) bisect (divide into two parts)…
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2D shapes – parallelogram
A parallelogram is a quadrilateral (a four-sided polygon) with two pairs of parallel sides. This means that the opposite sides of a parallelogram are equal in length and parallel to each other. The opposite angles of a parallelogram are also equal in measure. Some common properties of parallelograms include: Parallelograms are commonly used in geometry,…
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2D shapes – square
