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 ...

A triangle is a three-sided shape, where the sides are straight and meet at three vertices. The prefix "tri" means three. There are several types of triangles. Do you know what they are?

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