The sides of a triangle are 27 cm, 31 cm and a cm. Write an expression to calculate

The sides of a triangle are 27 cm, 31 cm and a cm. Write an expression to calculate the perimeter of this triangle. Find the perimeter if a = 10.27.

Given:
The first side of the triangle is 27 centimeters long.
The second side of the triangle is 31 centimeters.
The third side of the figure is a centimeters.
a = 10.27 centimeters.

Let’s write an expression for calculating the perimeter of a triangle:
P = (27 + 31 + a) = (58 + a) centimeters.
Find the perimeter if a is 10.27 centimeters:
P = 58 + 10.27 = 68.27 centimeters.
Answer: 68.27 centimeters.