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Across 5. On the same plane 7. Specific part of a line, has endpoints, can be measured 8. Middle point of a segment 9. Divide into two equal parts 10. Straight points that goes on forever in opposite directions; one of the three undefined terms in Geometry

Down 1. On the same line 2. Flat surface with width and length but no thickness; one of the three undefined terms in Geometry 3. Has one endpoint; goes on forever in one direction 4. Used to mark location; one of the three undefined terms in Geometry 6. Specific explanation of a word or term