Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene, obtuse, right ...

Two-dimensional (2D) shapes are completely flat. They have two dimensions – length and width. A polygon is a closed 2D shape with straight sides that meet at vertices. Polygons can be regular or ...

If you're outside soon after it gets sufficiently dark to see the stars this week, you may notice a large and slender isosceles triangle high in the southern night sky. The triangle appears tipped to ...