Triangle (bhargo Camp, Jalandhar

•A triangle is a clod figure bounded by three line segments.

• Triangles On the Basis of Sides. • Triangle On the Basis of Angles.

• SCALENE • ISOSCELES • EQUILATERAL

• If all the three sides of a triangle are unequal, it is called a SCALENE TRIANGLE. A

B

C

In the fig . A B ≠ B C ≠ CA

If any two sides of a triangle are equal it is called an isosceles triangle. A

B

C

In the adjoining fig. AB = AC

If all the three sides of a triangle are equal, it is called an equilateral triangle. A

B

In the adjoining fig. AB=BC=CA.

C

• OBTUSE ANGLED TRIANGLE • ACUTE ANGLED TRIANGLE • RIGHT ANGLED TRIANGLE

ACUTE ANGLED TRIANGLE

If all the three angles of a triangle are acute ( less than 90 degree) it is called an acute angled triangle. In the adjoining fig. each angle is less than 90 degree, so triangle ABC is an acute angled triangle.

ACUTE ANGLED TRIANGLE

If one of the angle of a triangle is OBTUSE ( greater than 90º ) It is called an obtuse angled triangle.

A

If one of the angle of the triangle is right angle (=90º) it is called a right angled triangle.

HYPOTENEOUS

In a right angled triangle, the side opposite to right In the fig.
C