Question

* If the perimeter of the triangle is 20 cm and the
two sides are & om and a co repectively. And
the length of the third side the triangle
​

Answer 1

Answer:

Given:

perimeter of triangle=20cm

and it's 2 sides

=> 4.2cm and 9cm

we have to find the 3rd side of triangle

Let the 3rd side be x

then we know that the perimeter of triangle =sum of all sides

ACCORDING TO QUESTION :

perimeter = sum of all sides

=> 20 = 4.2 +9+x

=> 20 = 13.2 + x

=> 20 – 13.2 = X

=> 6.8 = x

The third side of triangle=6.8cm