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In optics, particularly as it relates to film and photography, depth of field (DOF) is the distance between the nearest and ... more

The inradius (the radius of the incircle of the rhombus) can be expressed in terms of the diagonals.

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Trapezoid is a convex quadrilateral with only one pair of parallel sides. The parallel sides are called the bases of the trapezoid and the other two sides ... more

The Varigons theorem states that :

The midpoints of the sides of an arbitrary quadrangle form a parallelogram. If the quadrangle is convex or
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In Euclidean geometry, a cyclic quadrilateral or inscribed quadrilateral is a quadrilateral whose vertices all lie on a single circle. This circle is ... more

Concrete has relatively high compressive strength, but significantly lower tensile strength. As a result, without compensating, concrete would almost ... more

Quadrilateral is a polygon with four sides (or edges) and four vertices or corners. The area of a quadrilateral can be calculated by the sides and the ... more

In optics, particularly as it relates to film and photography, depth of field (DOF) is the distance between the nearest and ... more

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