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Triangle 0

Triangle

Select your language EnglishSpanish A triangle is a polygon with three sides (a, b, and c). All three sides meet two by two at three points, called vertices (A, B, and C). In a...

Types of triangles 0

Types of triangles

Select your language EnglishSpanish Triangles can be classified by their sides or by their angles. According to these, we can assert that there are basically six different types of triangles: equilateral triangle, isosceles triangle,...

Similar triangles 0

Similar triangles

Select your language EnglishSpanish In Euclidean geometry, two objects are similar if they are the same shape, regardless of their size. Two triangles are similar if, and only if, their angles are congruent (equal)...

Perimeter of an isosceles triangle 3

Perimeter of an Isosceles Triangle

Select your language EnglishSpanish The perimeter of an isosceles triangle is obtained as the addition of the three sides of the triangle. Having two equal sides, the perimeter is twice the repeated side (a)...

Angle bisector of a triangle 0

Angle bisector of a triangle

Select your language EnglishSpanish The angle bisector of a triangle is a line segment that bisects one of the vertex angles of a triangle, and ends up on the corresponding opposite side. There are...

Basic Elements of a Triangle 0

Basic Elements of a Triangle

Select your language EnglishSpanish The basic elements of a triangle are: Vertices: points where two sides meet. It has 3 vertices (A, B, and C). Sides: line segments that join two consecutive vertices of...

Geometric mean theorem 3

Geometric Mean Theorem

Select your language EnglishSpanish Geometric mean (or mean proportional) appears in two popular theorems regarding right triangles. The geometric mean theorem (or altitude theorem) states that the altitude to the hypotenuse of a right...

The elements of a right triangle 0

Basic Elements of a Right Triangle

Select your language EnglishSpanish In a right triangle, different elements can be distinguished, referring to its sides and angles. Legs (or cathetus): are the sides of the triangle that together form the right angle....

Cosine 0

Cosine

Select your language EnglishSpanish In a right triangle, the cosine of an angle θ is defined as the ratio of the adjacent leg (b) to the hypotenuse (c). It is one of the trigonometric...

Pythagorean theorem 0

Pythagorean Theorem

Select your language EnglishSpanish The Pythagorean Theorem describes a special relationship between the legs of a right triangle and its hypotenuse. A right triangle has one right angle (90°) and two minor angles (<90°)....