A scalene triangle with all angles less than 90° is an acute-angled triangle. A scalene triangle with angles of 50°, 60° and 70° is an acute-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 ...

Right-angled triangle. A right-angled triangle is a triangle where one of the angles is 90 degrees. A right angle is represented by a square, the side opposite the right angle.

Types of Triangle based on the angles Acute-angled Triangle: all interior angles are acute i.e less than 90 degree. Right-angled Triangle: one of the three interior angle is 90 degree.

The unpainted wooden parallelogram (rhomboid in Ross’s terminology) is bisected along a diagonal into two scalene triangles. A paper label attached to the model reads: Rhomboid A 4x6 Bisected.

Together these three form the scalene triangle of Indian politics. Ideologically too, these parties have their clear dividing lines with the BJP being right-of-centre and the Congress being left ...