Background. You'll be using Sketches 2, 3, and 4 of this file to explore which coloured triangles could fit into the given triangle outlines. Each triangle type has a different colour (pink for ...

As shown below, the largest anti-isosceles set in a 2×2 grid has two points; for a 3×3 grid, the largest anti-isosceles set has four points. (Note: For both grids, there are multiple sets with ...

An isosceles triangle with angles of 100°, 40° and 40° is an obtuse-angled triangle. Image caption, A scalene triangle with one angle greater than 90° is an obtuse-angled triangle.

You may hear students say words like ‘paralyzed’ triangle for isosceles and equilateral triangles after noticing the restrictive movements of these triangles upon dragging. Properties of symmetry: - ...