1. Made by Ms. Shobhana Sharma By KV INS HAMLA

2. TRIANGLES

3. A triangle has three line segments, three vertices and three angles .
TRIANGLES
A triangle has three line segments, three vertices and three angles .

4. PROPERTIES OF ANGLES
The sum of the lengths of any two sides of a triangle is greater than the length of the third side.

5. CLASSIFICATION OF TRIANGLES
ACCORDING TO SIDES

6. If all the 3 sides of a triangle are of different size, the triangle is called a scalene triangle.
2.3cm, 2.9cm, 2.6cm A C B

7. If at least 2 sides of a triangle are of same length, it is called an isosceles triangle.
2.3cm, 2.3cm, 2.6cm A B C

8. If all the three sides of a triangle are same, it is called an equilateral triangle.
3.2cm, 3.2cm, 3.2cm P Q R

9. CLASSIFICATION OF TRIANGLES
ACCORDING TO ANGLES

10. {1}
A triangle with all angles as acute is called an acute-angled triangle or an acute triangle.
35*
70*
75*

11. {2}
A triangle with one angle as obtuse is called an obtuse–angled triangle or an obtuse triangle.
30*
30*
120*

12. {3}
A triangle with one angle as right is called right-angled triangle or a right triangle.
50*
90*
40*

13. The End