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In mathematics, an annulus (the Latin word for “little ring”, with plural annuli) is a ring-shaped object, especially a region bounded by two ... more

In mathematics, an annulus (the Latin word for “little ring”, with plural annuli) is a ring-shaped object, especially a region bounded by two ... more

Related to the length of the sides of the triangle and the radius of the circumcircle of the triangle.

The area of an arbitrary triangle can be calculated from the two sides of the triangle and the included angle.
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The incircle or inscribed circle of a triangle is the largest circle contained in the triangle; it touches (is tangent to) the three sides. The center of ... more

The area related to the semi perimeter of the triangle and the radius of the inscribed circle.

Calculates the surface area of an ellipse with one-half minor and major axis of a and b respectively.

An equilateral triangle is a triangle in which all three sides are equal.

An isosceles triangle is a triangle that has two sides of equal length. The area of the isosceles triangle can be calculated by the lengths of the sides.

Rhombus is a simple (non-self-intersecting) quadrilateral whose four sides all have the same length. Every rhombus is a parallelogram, and a rhombus with ... more