The perimeter of parallelogram ABCD is 36 cm, its side AB is twice the size of dough BC. Determine all sides of the parallelogram.

This problem can be solved by the equation knowing the properties of the parallelogram:
Let’s make an equation, where: x is the smaller side, and 2x is the large side
Since the opposite sides in the parallelogram are equal, you need to find 2 values
The perimeter is the sum of all sides
Equation: x + x + 2x + 2x = 36
We give similar terms: 6x = 36, hence x = 36 ÷ 6 = 6cm (the smaller side)
2x = 6 × 2 = 12 cm (large side)
Answer: 6 and 12 cm (or 6, 6, 12, 12 cm)