3. A. Preliminary
In the table that follows, write T in the
second column if your guess on the
statement is true; otherwise, write F. You
are to revisit the same table later on and
respond to your guesses by writing R if you
were right or W if wrong under the third
column.
4. STATEMENT
My guess is
(T or F)
I was (R or
W)
1. A quadrilateral is a parallelogram if both pairs of
opposite sides are parallel.
2. A quadrilateral is a parallelogram if both pairs of
opposite sides are ≅.
3. A quadrilateral is a parallelogram if both pairs of
opposite angles are ≅.
4. A quadrilateral is a parallelogram if any two
consecutive angles are complementary.
5. A quadrilateral is a parallelogram if exactly one pair
of adjacent sides is perpendicular
6. A quadrilateral is a parallelogram if one pair of
opposite sides are both congruent and parallel
10. Conditions that guarantee a quadrilateral
a parallelogram:
1. Opposite sides of a are ≅
2. Opposite angles of a are ≅
3. Consecutive ∠ of a are
supplementary
4. The diagonals of a bisect each other
5. Either diagonal of a forms two ≅ ∆
11. What are the conditions
that guarantee that a
quadrilateral is a
parallelogram?
12. G.1. Alex uses DEFG in completing the table.
REASON
a. EF≅ _____
b. ∠𝑬 ≅ _____
c. 𝑭𝑮 ≅ _____
d. ∆𝑫𝑬𝑭 ≅ _____
e. 𝒎∠𝑫 + 𝒎∠𝑮 = _____
