Solution of triangles (Latin: solutio triangulorum) is the main trigonometric problem of finding the characteristics of a triangle (angles and lengths...

be restricted to spherical triangles, referred to simply as triangles. Both vertices and angles at the vertices of a triangle are denoted by the same upper...

are given. The theorem is used in solution of triangles, i.e., to find (see Figure 3): the third side of a triangle if two sides and the angle between...

rational solutions of the above equation) are sometimes also called Heronian triangles or rational triangles; in this article, these more general triangles will...

Congruence of triangles may refer to: Congruence (geometry)#Congruence of triangles Solution of triangles This disambiguation page lists articles associated...

Proofs of trigonometric identities Pythagorean trigonometric identity Tangent half-angle formula Solution of triangles Law of sines Law of cosines Law of tangents...

spherical triangles Law of cosines Law of tangents Law of cotangents Mollweide's formula – for checking solutions of triangles Solution of triangles Surveying...

lines, 5 triangles 6 lines, 7 triangles 7 lines, 11 triangles Roberts's triangle theorem, on the minimum number of triangles that n {\displaystyle n} lines...

journal of semiotics Super Soft Source or Super soft X-ray source Omega baryon (Ω−), with a quark content of sss Side-side-side, solution of triangles with...

triangles are said to be 5-Con or almost congruent if they are not congruent triangles but they are similar triangles and share two side lengths (of non-corresponding...

equilateral triangles are similar. Two triangles, both similar to a third triangle, are similar to each other (transitivity of similarity of triangles). Corresponding...

constructed with equilateral triangles. Other two-dimensional objects built from equilateral triangles include the Sierpiński triangle (a fractal shape constructed...

special cases are degenerate. For example, right triangles, isosceles triangles and equilateral triangles are non-generic and non-degenerate. In fact, degenerate...

respect to triangles △ACD, △BCD; This leads to draw two other equilateral triangles △ACF, △BCG, where F, G are located outside the △ABC triangle, as well...

The concept of included angle is discussed at: Congruence of triangles Solution of triangles This disambiguation page lists mathematics articles associated...

Uses of trigonometry De Finetti diagram Triangle mesh Nonobtuse mesh Encyclopedia of Triangle Centers Pythagorean Triangles The Secrets of Triangles Triangular...

Early study of triangles can be traced to Egyptian mathematics (Rhind Mathematical Papyrus) and Babylonian mathematics during the 2nd millennium BC. Systematic...

only such triangles are rational-sided equilateral triangles. Any triple of positive integers can serve as the side lengths of an integer triangle as long...

The Lithium Triangle (Spanish: Triángulo del Litio) is a region of the Andes that is rich in lithium reserves, encompassed by the borders of Argentina,...

and obtuse triangles (oblique triangles) Spiral of Theodorus Trirectangular spherical triangle Di Domenico, Angelo S., "A property of triangles involving...

1923. This solution involves drawing one additional line, and then making repeated use of the fact that the internal angles of a triangle add up to 180°...

trigonometry, the law of cosines (also called the cosine rule for sides) is a theorem relating the sides and angles of spherical triangles, analogous to the...

right-angled triangle, but one has a 1×1 hole in it. The key to the puzzle is the fact that neither of the 13×5 "triangles" is truly a triangle, nor would...

right side, the triangles are placed such that the corners of the square correspond to the corners of the right angle in the triangles, forming a square...

special right triangles are specified by the relationships of the angles of which the triangle is composed. The angles of these triangles are such that...

There exist non-primitive Pythagorean triangles with integer altitude from the hypotenuse. Such Pythagorean triangles are known as decomposable since they...

trigonometry, a skinny triangle[citation needed] is a triangle whose height is much greater than its base. The solution of such triangles can be greatly simplified...

{\tbinom {6}{3}}=20} different triangles, four of which are shaded in the figure. Six of these 20 triangles, with two of the shaded shapes, have area 1/8;...

called a triangle group. In the sphere there are three Möbius triangles plus one one-parameter family; in the plane there are three Möbius triangles, while...

mathematical study of isosceles triangles dates back to ancient Egyptian mathematics and Babylonian mathematics. Isosceles triangles have been used as...