The semi perimeter of a triangle having the length of its sides as 20cm, 15cm and 9cm is

Semi-perimeter of a Triangle

The semi-perimeter (denoted as s) of a triangle is given by the formula:

s = ½(a + b + c)

Where a, b, and c are the lengths of the sides of the triangle.

Given the sides as:

• a = 20 cm
• b = 15 cm
• c = 9 cm

Substituting the values:

s = ½(20 + 15 + 9) = ½(44) = 22 cm

So, the semi-perimeter of the triangle is 22 cm.