## 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...

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## Mathematical Way Blog

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## Mathematical Way Finder:

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Double-Angle Formulas

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Thales’ Theorem

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Basic Elements of a Triangle

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Perimeter of an Isosceles Triangle

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Isosceles Triangle

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Basic Elements of a Right Triangle

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Area of a scalene triangle

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Centroid of a Triangle

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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...

Select your language EnglishSpanish There are several theorems that are attributed to Thales of Miletus, we are going to focus especially on two of them: Thales’ Theorem Thales’ Theorem is a special case of...

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...

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)...

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...

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....

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...

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...