Question

the perimeter of a triangle is 40. Two of its sides measure 12.9cm and 14.6cm.Find the length of its third side​

Answer 1

Answer:

12.5

Step-by-step explanation:

12.9+14.6=27.5

27.5-40=12.5

Answer 2

Answer:

The third side of the triangle will be 12.5 cm

Step-by-step explanation:

Here the perimeter of the triangle is given to be 40 cm

Also, two sides of the triangle are given to be 12.9 cm and 14.6 cm

We have to find the third side of the triangle

Let the third side be x

perimeter of triangle = sum of three sides

40 = 12.9 + 14.6 + x

40 = 27.5 + x

x = 40 - 27.5

x = 12.5 cm