The document contains a geometry drill with 10 figures labeled ABCD. Students are to determine if each figure is a parallelogram based on given information such as side lengths or angles, and cite the relevant definition or theorem if it is a parallelogram. The figures include ones where sides are marked as equal, a figure with a marked right angle, and ones where angles are marked but side lengths are not given.

1. GT Geometry Drill 2/4/13
Use the information and theorems from
Friday to determine if the following are
parallelograms!

2. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
12
D
C
8
8
12
A
B

3. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
12
D
C
O
12
A
B

4. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
D
C
O
A
B

5. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
D
C
O
A
B

6. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
D
C
700
700
B
A

7. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
D
C
1100 700
700
A
B

8. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
D C
A B

9. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
D C
A B

10. Study the marking on each figure and decided whether
ABCD must be a parallelogram. If the answer is yes, state
the definition or theorem that applies
D C
O
A B