A scalene triangle with one angle greater than 90° is an obtuse-angled triangle. A scalene triangle with angles of 100°, 20° and 60° is an obtuse-angled triangle.

Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene, obtuse ...

CBSE Class 9 Maths Chapter 6 Lines and Angles Extra Questions for 2020-21. Practice with these important questions to perform well in your Maths exam.

The latter authors discovered in 1992 a class of obtuse triangles which contain particular periodic billiard paths. In this article, we review the above-mentioned results and some of the techniques ...

Symbolism of Different Shaped Triangles All triangles are not the same. Many are shaped differently based on how acute or obtuse the angles on each point are.