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. 1 of 10 ...

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 scalene triangle is a triangle where none of the sides and none of the angles are equal. ... Obtuse-angled triangle. An obtuse-angled triangle is a triangle that has one obtuse angle.