Question

1. parallelogram abcd is a square. the length of side bc = x + 4 and the perimeter of abcd = 80. what is the length of side bc?

Explanation:

Step1: Recall the perimeter formula for a square

The perimeter \(P\) of a square is \(P = 4s\), where \(s\) is the side - length.

Step2: Substitute the given values into the formula

Given \(P=80\), then \(80 = 4s\). Solving for \(s\), we divide both sides by 4: \(s=\frac{80}{4}=20\). Since \(BC\) is a side of the square, the length of \(BC\) is 20.

Answer:

20