Example:
The sides of the triangle ABC are 12 cm, 5 cm and 9 cm. Find its perimeter.
Example:
Perimeter of the triangle (P) = S_{1} + S_{2} + S_{3}
Where P is the perimeter of the triangle, S_{1}, S_{2} and S_{3} are the sides of the triangle.
Given that,
S_{1} = 12 cm, S_{2} = 5 cm and S_{3} = 9 cm.
Hence P = 12 + 5 + 9
i.e P = 26 cm.
Therefore, the perimeter of the given triangle is 26 cm.
Directions: Read the above example carefully and answer the following questions. Also draw 10 different triangles, measure their angles and find their perimeters.
