Respuesta :
Pythagoreans' theorem only applies to right angle triangles.
To find unknowns of an irregular triangle use
a² = b² + c² -2bc cos A
( for length and angle )
and
½ ab sin C ( for area )
To find unknowns of an irregular triangle use
a² = b² + c² -2bc cos A
( for length and angle )
and
½ ab sin C ( for area )