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 ...

Polygons can be regular or irregular. If the angles are all equal and all the sides are equal length it is a regular polygon. To find the sum of interior angles in a polygon divide the polygon ...

Watch this video to learn about acute, obtuse, right and reflex angles. An angle is the space between two lines that start at the same point and you measure them in degrees. Angles can be between ...