What is the greatest subset of these N2 points such that no three of them form an isosceles triangle? (Note: Degenerate triangles, or triangles with zero area, do count as triangles here, as long ...

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

Note that the equilateral triangles cannot be used and isosceles triangles will fit only into the two left-most outlines. The anticipation is that students will first use the green (right) and pink ...

Explore the triangle area formula, its derivation, and practical examples to master this essential geometric concept effortlessly.

This huge, nearly isosceles triangle is composed of three of the brightest stars in the sky, each the brightest star in its own constellation.

Learn about properties of triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

You'll be using Sketch 1 of this file which has three different types of triangles - scalene, isosceles, equilateral. Each triangle type has a different colour (pink for scalene, red for equilateral, ...