Answer:
10 cm
Step-by-step explanation:
From the question,
Area of a square = (Length)²
A = L²............................ Equation 1
Where A = Area of the screen, L = Length of the Screen
make L the subject of the equation
L = [tex]\sqrt{A}[/tex].................... Equation 2
Given: A = 100 cm²
Substitute into equation 2
L = [tex]\sqrt{100}[/tex]
L = 10 cm
Hence the length of the screen is 10 cm
