Very clever! Now we have an equilateral triangle. Three sides of equal length andall the angles are 60 degrees. This is a scalene triangle. All the sides are different lengths and each angle is ...

Adjacent angles are one of the earliest and most important concepts to learn in basic geometry, as they have applications in ...

It's possible to demonstrate and prove mathematically that the angle sum of every triangle is 180 degrees. The techniques used are useful for solving all kinds of other geometry problems too.