Answer: 16 inches
Step-by-step explanation:
To solve this question, we will use the Pythagoras theorem which will be:
Diagonal² = Length² + Width²
20² = 12² + width²
400 = 144 + width²
width² = 400 - 144
Width² = 256
Width = ✓256
Width = 16
The width of the tv is 16 inches
