Shape,
Space and Measures

The Pinboard Problem

Triangles, quadrilaterals and other polygons

Using a 3 by 3 array on a pinboard, identify the eight distinct triangles that can be constructed (eliminating reflections, rotations or translations). Classify the triangles according to their side, angle and symmetry properties.

Isosceles

Right angled

Triangle

Can you find all 8 triangles?

Can you find all 8 triangles?

2003-10-24T14:42:40