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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...

Incenter of a triangle 0

Geometry

Incenter of a triangle

Select your language EnglishSpanish The incenter of a triangle (I) is the point where the three interior angle bisectors (Ba, Bb y Bc) intersect. The angle bisector of a triangle is a line segment...

Perimeter of an equilateral triangle 0

Geometry

Perimeter of an Equilateral Triangle

Select your language EnglishSpanish The equilateral triangle has all three sides equal, so its perimeter will be three times the length of one of its sides (a). Download this calculator to get the results...

Median of a triangle 0

Geometry

Median of a triangle

Select your language EnglishSpanish The median of a triangle is a line segment that joins one of its vertices with the center of the opposite side. Every triangle has three medians (ma, mb and...

Area of a scalene triangle 0

Geometry

Area of a scalene triangle

Select your language EnglishSpanish The area of a scalene triangle can be calculated using Heron’s formula if all its sides (a, b and c) are known. It could also be calculated if a side...

Tangent 0

Trigonometry

Tangent

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

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...

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...

Perimeter of an isosceles triangle 4

Geometry

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)...

Arctangent 0

Trigonometry

Arctangent

Select your language EnglishSpanish The arctangent (notation: arctan or tan-1) is the inverse function of the tangent. That is: As the arctangent and tangent are inverse functions, their composition is the identity. Thus: Properties...

Centroid of a triangle 1

Geometry

Centroid of a Triangle

Select your language EnglishSpanish The centroid of a triangle (or barycenter of a triangle) G is the point where the three medians of the triangle meet. The medians of a triangle are the line...