Cosine theorem
Theorems
Theorem in geometry is a proof - an argument establishing a property. A theorem is a statement that proves some property and requiring establishment. Theorems are also called lemmas, properties, consequences, rules, signs, affirmations.
Cosine theorem
The cosine theorem declares: the square of either side of the triangle is the sum of the squares of the other two sides of the triangle minus the double product of these sides by the cosine of the angle between them.
- Area
- Volume
- Perimeter
- Side
- Height
- Diagonal
- Radius
- Median
- Bisector
- Angle
- Theorems
