Resolutor de Triángulos Rectángulos
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Formula & Theory Library

A curated collection of geometric principles and algebraic identities.

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Pythagorean Theorem

A fundamental relation in Euclidean geometry among the three sides of a right triangle.

a2 + b2 = c2
a² b² =c² +
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SOH CAH TOA

A mnemonic for the three trigonometric ratios.

Sine O / H
Cosine A / H
Tangent O / A

45-45-90 Triangle

The isosceles right triangle, with ratio 1 : 1 : √2.

x x x√2 45° 45°

calculate Area Formulas

Circle

A = πr2

Triangle

A = ½bh
φ ≈ 1.618
star Spotlight Theorem

The Divine Proportion (φ)

In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.