Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...

Tessellations aren’t just eye-catching patterns—they can be used to crack complex mathematical problems. By repeatedly ...

Click to open image viewer. Hinged Plane Dissection, Two triangles and two quadrilaterals which can be arranged as two different triangles (front side). CC0 Usage Conditions ApplyClick for more ...

Click to open image viewer. Hinged Plane Dissection, Two triangles and two quadrilaterals which can be arranged as a quadrilateral or a triangle. CC0 Usage Conditions ApplyClick for more information.

Blaise Pascal independently rediscovered classical geometry at the age of 12 despite a ban on formal maths studies. His early ...