1. convexo   heptagon   perpendicular lines   convex   ellipse   Hint Half-n-half Clue   2. línea recta   parallel lines   straight line   heptagon   perpendicular lines   Half-n-half Clue   3. cuadrilátero   quadrilateral   perpendicular lines   edge   pyramid   Half-n-half Clue   4. heptágono   vertex   heptagon   straight line   perpendicular lines   Half-n-half Clue   5. cima   vertex   polygon   ray   hemisphere   Half-n-half Clue   6. cóncavo   quadrilateral   segment   concave   quadrangle   Half-n-half Clue   7. rayo   ray   convex   quadrangle   quadrilateral   Half-n-half Clue