Made by Ms. Shobhana Sharma By KV INS HAMLA

TRIANGLES

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

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

CLASSIFICATION OF TRIANGLES ACCORDING TO SIDES

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

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

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

CLASSIFICATION OF TRIANGLES ACCORDING TO ANGLES

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

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

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

The End