Which side of the reference line is the other side?

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Multiple Choice

Which side of the reference line is the other side?

Explanation:
A reference line divides the plane into two half-planes: one on each side. For a horizontal line, those regions are above (top) and below (bottom). The phrase “the other side” means the region opposite to the one you’re considering, so the side across the line from bottom is the top side. Left and right describe directions along the line itself, not the opposite half-plane, so they don’t fit the idea of the other side.

A reference line divides the plane into two half-planes: one on each side. For a horizontal line, those regions are above (top) and below (bottom). The phrase “the other side” means the region opposite to the one you’re considering, so the side across the line from bottom is the top side. Left and right describe directions along the line itself, not the opposite half-plane, so they don’t fit the idea of the other side.

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