Geo Geometry Stick for School Maths Lab

Quick Answer: Geo Geometry Stick for School Maths Lab is a set of sticks or strips that, in the usual design, join at their ends to form polygon frames. Students use geometry sticks to build triangles and quadrilaterals, discover why triangles are rigid, test which lengths make a triangle and measure angles at the joints.

Shapes Built from Their Sides

Most shape equipment gives pupils finished shapes. Sticks give them the sides and ask them to make the shape, which puts the focus on how sides and angles relate. In the usual design the sticks join at their ends with fasteners that let the joints pivot, and that single feature leads to one of the most memorable lessons in geometry.

Build a triangle and push on one corner: it keeps its shape. Build a four-sided frame and push: it collapses from a rectangle into a parallelogram. The side lengths have not changed, so the perimeter stays the same, but the angles and the enclosed area change. Add a diagonal stick and the quadrilateral becomes two triangles and stops moving. This is why bridges, towers and roof trusses are full of triangles, and pupils can see the reason in their hands.

Sticks of different lengths lead to the triangle inequality. Pupils choose three sticks and try to join them. With lengths such as 3, 4 and 10 units, the two short sticks cannot reach each other, because together they are shorter than the long one. Collecting results for many sets of three leads the class to the rule: any two sides of a triangle must together be longer than the third side.

Applications

• Showing that triangles are rigid while quadrilaterals can change shape
• Discovering the triangle inequality by trying sets of three lengths
• Classifying triangles as equilateral, isosceles or scalene by their sides
• Measuring angles at the joints with a protractor
• Adding diagonals to polygons and counting the triangles formed

Specifications

Care & Handling

• Keep the fasteners for the geometry sticks in a small container so they are not lost between lessons.
• Undo frames by releasing the fasteners rather than pulling the sticks apart.
• Sort the sticks by length when storing so groups can find matching sides quickly.

Why Choose LabEquip

Middle-school teachers who want pupils to construct shapes rather than just identify them are the usual buyers. LabEquip lists the sticks in Mathematics School Lab Products, where the Geometrical Figures set covers ready-made shapes; reach us through the contact page.

Frequently Asked Questions

Why is a triangle rigid while a quadrilateral is not?

Three side lengths fix a triangle’s angles, so a triangle frame cannot change shape without changing a side. Four sides do not fix the angles, so a four-sided frame can be pushed from a rectangle into a parallelogram.

How do the sticks show the triangle inequality?

Pupils try to make a triangle from three sticks. If the two shorter sticks together are not longer than the longest, their ends cannot meet. Testing many sets leads to the rule that any two sides must together exceed the third.

How can the sticks show that perimeter and area are different?

Make a rectangle from four sticks and then push it into a slanted parallelogram. The perimeter is unchanged because the sticks are the same, but the area gets smaller as the shape flattens.

How are angles measured on a stick model?

Lay the frame flat, place the centre of a protractor on the joint and line up its baseline with one stick. Read the angle where the other stick crosses the scale.

What shapes can be made with geometry sticks?

Any polygon whose sides match the available lengths, such as triangles, squares, rectangles, rhombuses, trapeziums and pentagons. Adding diagonals shows how polygons divide into triangles.

How are the sticks joined?

In the usual design the ends are joined with small fasteners that allow the joints to turn. The type of fastener and the lengths of stick supplied should be confirmed when you enquire.

Last Updated: September 2026