Theorems

cosine theorem

, , c blue - sides of a scalene triangle

alpha red1 , beta green , Y blue - opposite angles

Formulas of law of cosines :

cosine theorem F a

cosine theorem F b

cosine theorem F c

sine theorem

, , c blue - sides of an scalene triangle

alpha red1 , beta green , Y blue - opposite angles

Formulas of law of sines :

sine theorem F

Pythagorean theorem

, - legs of a right triangle

c blue - hypotenuse

The Pythagorean Theorem (formula) :

Pythagorean theorem F

The law of cosines