Types of triangles · त्रिभुज के प्रकार
Equilateral or scalene? Acute or obtuse? Find the missing angle.
Types of triangles games
Types of triangles · त्रिभुज के प्रकार
| By sides | By angles |
|---|---|
| Equilateral (समबाहु): all sides equal, each angle 60° | Acute-angled (न्यूनकोण): all angles < 90° |
| Isosceles (समद्विबाहु): two sides equal, two angles equal | Right-angled (समकोण): one angle = 90° |
| Scalene (विषमबाहु): no sides equal | Obtuse-angled (अधिककोण): one angle > 90° |
Angle sum property: the three angles of a triangle add up to 180°. Exterior angle = sum of the two opposite interior angles.
Any two sides together are longer than the third side (triangle inequality).
For Class 6 to 8 (NCERT Ganita Prakash 7, “A Tale of Three Intersecting Lines”).
A one-page chart to stick on the wall, and a worksheet to practise.
Types of triangles
Types of triangles · त्रिभुज के प्रकार
| By sides | By angles |
|---|---|
| Equilateral (समबाहु): all sides equal, each angle 60° | Acute-angled (न्यूनकोण): all angles < 90° |
| Isosceles (समद्विबाहु): two sides equal, two angles equal | Right-angled (समकोण): one angle = 90° |
| Scalene (विषमबाहु): no sides equal | Obtuse-angled (अधिककोण): one angle > 90° |
Angle sum property: the three angles of a triangle add up to 180°. Exterior angle = sum of the two opposite interior angles.
Any two sides together are longer than the third side (triangle inequality).
kheloaurseekho.in — free charts, games and worksheets
Triangles — worksheet
Name: ____________________ Class: ______ Date: __________
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