## The Rhombus |
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The Rhombus is a special parallelogram, thatis parallelogram which has two consecutive sides congruent. The Rhombus thus has all sides congruent and diagonals perpendicular. |
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## Regular Polygon |
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The Regular Polygon the convex polygon which has all sides congruent (equal).
For a regular polygon area is calculated by multiplying no. sides to the length of one of them. is the apothem of the polygon (perpendicular to the center of a polygon on one of its sides).a |
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## The Ellipse |
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The Ellipse is defined as the flat curve which is the locus of points for which the sum of distances from two fixed points (called the focus of the ellipse) is constant.Ellipse area is calculated as . |
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## TheThorus |
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The Area of a Thorus is calculated using the formula. |
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## Other solids |
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## The Spheric Callote |
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The area of Spheric Callote could be calculated using the formula |
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## The Spheric Zone |
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The area of Spheric Zone could be calculated using the formula (the same as that of the Spheric Callote): . |
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## The Single Base Spherical Segment |
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The Volume for the Single Base Segment Spherical is calculated using the formula: . |
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## The Spherical Segment with two bases |
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The Volume for the Segment Spherical with two bases is calculated using the formula: . |

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