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Double-Angle Formulas 0

Trigonometry

Double-Angle Formulas

Select your language EnglishSpanish Let α be an angle. The double-angle (2α) trigonometric ratios can be expressed as a function of the trigonometric ratios of the angle α, that is, the double-angle formulas: Double-Angle...

Right triangle 0

Geometry

Right Triangle

Select your language EnglishSpanish A right triangle is a polygon with three sides that has one angle (α) that measures 90° which is the largest angle of the right triangle. If we add all...

Scalene triangle 0

Geometry

Scalene Triangle

Select your language EnglishSpanish A scalene triangle is a triangle in which all three sides have different lengths and all angles are diferent too. This type of triangle can be a right triangle (one...

Cosecant 0

Trigonometry

Cosecant

Select your language EnglishSpanish The cosecant is the reciprocal trigonometric ratio of the sine. It is the reciprocal or multiplicative inverse of the sine, that is, csc θ · sin θ = 1. In a right triangle, the cosecant of...

Geometry 0

Mathematics

Geometry

Select your language EnglishSpanish GEOMETRY What is geometry? Straight line Polygon Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon Conic Section Circle, Semicircle, and Annulus Polyhedron Prism Pyramid Regular polyhedron Surface Area of Revolution Shapes in...

Equilateral triangle 0

Geometry

Equilateral triangle

Select your language EnglishSpanish The equilateral triangle is the regular polygon simplest. Its three sides are equal. Therefore, their angles are also the three equal. Since all angles are equal and the angles are...

Triangle Center 0

Geometry

Triangle Center

Select your language EnglishSpanish Some classical triangle centers are: Centroid (G) Orthocenter (H) Circumcenter (O) Incenter (I) Centroid of a Triangle The centroid of a triangle (or barycenter of a triangle) G is the...

Cotangent 0

Trigonometry

Cotangent

Select your language EnglishSpanish The cotangent is the reciprocal trigonometric ratio of the tangent. It is the reciprocal or multiplicative inverse of the tangent, that is, tan θ · cotθ = 1. In a right triangle, the cotangent of...

Leg 0

Geometry

Leg

Select your language EnglishSpanish The legs (or catheti; singular: cathetus) are the sides in a right triangle that form its right angle (90°). The side opposite the right angle is called the hypotenuse. The...

Altitude of a triangle 0

Geometry

Altitude of a Triangle

Select your language EnglishSpanish The altitude of a triangle, or height, is a line from a vertex to the opposite side, that is perpendicular to that side. It can also be understood as the...

Isosceles triangle 0

Geometry

Isosceles Triangle

Select your language EnglishSpanish The isosceles triangle is a polygon of three sides with two equal sides. The other side unequal is called the base of the triangle. Therefore, the angles will also be...