Cut a paper in the form of a triangle in such a way that one of the angles formed is an
obtuse angle, that is, making an angle which measures more than 90^0. The triangle
thus formed is an obtuse angled triangle.
- Scalene Triangle
Take a neatly cut paper, choose any one vertex and cut the paper in such a way that
no three sides are of equal length. The triangle thus formed is a scalene triangle.
- Isosceles Triangle
Fold a neatly cut paper exactly into two halves. Mark a point on the impression thus
created. Cut off a triangle from the point marked to any two vertices. The triangle
thus formed is an isosceles triangle. ABC, DBC and EBC are all isosceles triangles.
- Incentre
A
B C
A
I
D F
C E B
G
ll
G HH
C B
A
