1S. When the witch's spell no longer works. -- HEXAGON
2E. A bent line that's been in an accident. -- RECTANGLE
3W. A person who is kin to another. --RELATION
4E. A social gathering or occasion. --FUNCTION
5N. A smart time piece. --CLOCKWISE
6W. How does the calculus student's dog bark? (Actually, the dog says this word twice) -- ARC (ARC ARC)
7E. Stay away from the SYMMETRY on Halloween!
8E. Amy sent the get well card to her SECANT.
9S. You need to win three of these in volleyball to take the match. -- SET
10W. Michael rolled his eyes at his dad, hoping that he would soon get to the POINT.
11N. What Billy Ori brewed in his home. -- ORIGIN
12S. A father upon seeing the bathroom door closed, muttered to himself, "Is that daughter of mine CYLINDER?"
13N. A song in an opera. -- AREA
14E. Something that never changes. -- CONSTANT
15E. A prisoner's poem. -- CONVERSE
16W. Where escaped prisoners hide out. -- CONCAVE
17S. What a gentleman goes to the beach to become. -- TANGENT
18S. Sarah thought her math teacher was from a different SPHERE.
19W. A hotel book keeper. -- INSCRIBE
20N. When a toilet is flushed in an airplane. -- HYPOTENUSE
21N. The opposite of a stop sign. -- COSINE