Setting posts is tricky—you typically need a solid base and a top that is completely level, which is difficult when the base of a post is sitting on an angle. Here's a great tip for obtaining the ...

Polygons are two dimensional shapes with straight sides. They can be described by the number of sides they have and whether the shape is regular or irregular. Where the straight sides of the polygon ...

Sometimes we need to know how to calculate values for specific sections of a circle. These can include arc lengths, the area and perimeter of sectors and the area of segments. Loci and constructions – ...