• A blackboard set square with a 60-degree angle is a geometric drawing tool used for creating and measuring angles of 60 degrees.
• Similar to the 45-degree set square, this tool is commonly made of transparent plastic or other durable materials.
• The 60-degree set square is designed to assist in drawing accurate lines and angles on a blackboard or a similar writing surface.
• The "60-degree" designation indicates that one of the angles within the set square measures 60 degrees, while the other two angles are each 60 degrees as well, making it an equilateral triangle.