Find out about regular 2D shapes and irregular polygons. Types of triangle Find out about scalene, equilateral, isosceles and right-angled triangles. Parts of a circle Discover the features of a ...
Polygons can be regular or irregular. If the angles are all equal, and all the sides are equal in length, it is a regular polygon. To find the sum of interior angles in a polygon, divide the polygon ...
Arcturus, Spica, and Denebola form the easily visible Spring Triangle. The Spring Triangle is best viewed without any equipment. A small telescope reveals the Mini Coathanger. A large telescope is ...