Geometry

Question Analysis:
This algebra-geometry hybrid problem requires applying the opposite sides equality property to find side lengths.

Key Concept Explanation:
Key parallelogram property:
- Opposite sides are equal in length (EF = GH, FG = EH)
- This allows setting expressions for opposite sides equal to solve for variables

Step-by-Step Solution:
Find EF when x = 4:
EF = 3(4) + 5 = 12 + 5 = 17
EF = GH = 17

Common Mistakes:
Misapplying the property to adjacent sides

Summary:
The problem demonstrates how geome...