Angel Sum Property of Triangle Manufacturer,Supplier and Exporter
Product Code : SEL-ML-10281
Quick Answer: Students use the cut-out interior angles of this triangle to check that any exterior angle equals the sum of the two interior opposite angles, and to explore the angle sum property on a desk or a magnetic board.
Last updated: October 2026
Key Features
Triangle with cut-outs of its interior angles
Verifies that an exterior angle equals the sum of the interior opposite angles
Explores the angle sum property of a triangle
Shows the relation between interior and exterior angles
Can be demonstrated on a magnetic board
Supports learning the concept of a straight angle
About This Product
When the three angle pieces are placed side by side, they line up along a straight edge, giving pupils a hands-on reason why the angles of a triangle make a straight angle. Fitting two of the pieces into the exterior angle shows the exterior angle property just as directly. Teachers can repeat the activity on a magnetic board so the whole class follows, which makes it a practical item among maths lab instruments for early geometry. Buyers in Ecuador, Turkmenistan, Sudan, Portugal, Poland and South Korea can send an export enquiry for the Angel Sum Property of Triangle.
Frequently Asked Questions
What can students verify with it?
That any exterior angle of a triangle equals the sum of its interior opposite angles, along with the angle sum property and the relation between interior and exterior angles.
