Related ideas like the side opposite to the greatest angle of the triangle is the longest
side and vice-versa may also be explained simultaneously.
- Scalene triangle
A triangle with no two sides are equal is called a scalene triangle. The idea may be
explained orally supported by the provision of a scalene triangle constructed in paper.
- Acute angled triangle
If all the three angles of a triangle are acute, that is if all the three angles are less
than 90o then the triangle is called an acute angled triangle.
The idea may be explained orally supported by the provision of an acute angled
triangle constructed with the help of a paper.
- Obtuse angled triangle
A triangle in which one of its angles is greater than 90o is said to be an obtuse angled
triangle.
A
BC
C B
A
C
A
B
110 O
