scott554
contestada

A triangle has a perimeter of 27.6 centimeters. Two of the sides measure 6.9 centimeters and 11.5 centimeters. What is the length of the third side?
please help!

Respuesta :

Eduard22sly

Answer:

9.2cm

Step-by-step explanation:

Let the sides be a, b and c

Let the unknown side be c

a = 6.9cm

b = 11.5cm

c =?

P = 27.6cm

P = a + b + c

27.6 = 6.9 + 11.5 + c

27.6 = 18.4 + c

Collect like terms

27.6 — 18.4 = c

c = 9.2

Therefore, the length of the third side is 9.2cm