The area of an arbitrary triangle can be calculated from the two sides of the triangle and the included angle.
Generalization of the Pythagorean theorem for the side opposite of the acute angle of an arbitrary triangle... more
Generalization of the Pythagorean theorem for the side opposite of the obtuse angle of an arbitrary triangle... more
In geometry, the Euler line is a line determined from any triangle that is not equilateral. It passes through several important points determined from the ... more
Altitude of a triangle is a line segment through a vertex and perpendicular to a line containing the base (the opposite side of the triangle). This line ... more
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