What is the perimeter of triangle ABC round each step by the nearest 10th see image. Thanks so much

The perimeter of the triangle is : 12.6.
This result is obtain by the use of triangle perimeter formula :
[tex]P = a+b+c\\[/tex]
Where : a is the distance between the points A and B
b is the distance between the points B and C
c is the distance between the points C and A