One side of the triangle is 12 cm and the other two make up 80% of this side. Calculate the perimeter of a triangle

Suppose you are given a triangle with sides abc.
a = 12 cm.
Let’s make the proportion:
12 cm – 100%
b + c – 80%
b + c = 12 * 80/100 = 9.6 cm.
The perimeter of a triangle is calculated using the formula P = a + b + c.
a = 12 cm
b + c = 9.6 cm
P = 12 + 9.6 = 21.6 cm.
Answer: The perimeter of the triangle is 21.6 cm.