This document contains an anticipation-reaction guide with 15 statements about parallelism, perpendicularity, and different types of quadrilaterals. The guide is meant to be completed before and after a lesson by indicating whether the respondent agrees (A) or disagrees (D) with each statement. Statements cover topics such as the definitions of parallel and perpendicular lines, properties of parallelograms, and relationships between different quadrilaterals like squares, rectangles, and rhombi.

1. Activity 1 (answer key)
ANTICIPATION-REACTION GUIDE
Read each statement under the column TOPIC and write A if you agree with the statement;
otherwise, write D.
Before-Lesson
Response
TOPIC: Parallelism and Perpendicularity
A 1. Lines that do not intersect are
parallel lines.
D 2. Skew lines are coplanar.
A 3. Transversal is a line that intersects
two or more lines.
A 4. Perpendicular lines are intersecting
lines.
A 5. If two lines are parallel to a third line,
then the two lines are parallel.
D 6. If two lines are perpendicular to the
same line then the two lines are
parallel.
A 7. If one side of a quadrilateral is
congruent to its opposite side, then
the quadrilateral is a parallelogram.
A 8. Diagonals of a parallelogram bisect
each other.
A 9. Diagonals of a parallelogram are
congruent.
D 10. Diagonals of a parallelogram are
perpendicular.
A 11. Opposite sides of a parallelogram are
parallel.
A 12. Opposite angles of a parallelogram
are congruent.
D 13. Consecutive angles of a
parallelogram are congruent.
A 14. Squares are rectangles.
A 15. Squares are rhombi.