1. straight line   ping [hang;hang;heng;xing] si [bian;bian] xing   duan   zhi xian   jin zi [da;ta]   Hint Half-n-half Clue   2. segment   [leng;leng;ling] jing   duan   ping [hang;hang;heng;xing] si [bian;bian] xing   chui zhi xian   Half-n-half Clue   3. quadrilateral   jin zi [da;ta]   tuo yuan   duan   si fang xing   Half-n-half Clue   4. hexagon   [leng;leng;ling] jing   duo [jia;jiao;jue] xing   [liu;lu] [jia;jiao;jue] xing   chui zhi xian   Half-n-half Clue   5. ray   chui zhi xian   guang [mang;wang]   fei ji   jin zi [da;ta]   Half-n-half Clue   6. polygon   duo [jia;jiao;jue] xing   guang [mang;wang]   luan xing   zhi xian   Half-n-half Clue   7. perpendicular lines   luan xing   zhi xian   duo [jia;jiao;jue] xing   chui zhi xian   Half-n-half Clue