Question

The perimeter of a triangle is 26.6cm.Two of its sides are 7.1cm and 9cm.Find the length of the third side of the third side of the triangle.​

Answer 1

Answer:10.5

Step-by-step explanation

Let side of triangle be A ,B and C

A+B+C=26.6

9+7.1+C=26.6

C=26.6-16.1

=10.5

Answer 2

Answer:it is simple .

Perimeter of triangle =sum of three sides

Let the third side be x

Now perimeter =26.6

26.6 = 7.1 +9+x

26.6 _( 7.1 +9) = x

26.6_16.1 =x

10.5 =x

Hence third side =10.5 cm