Proving the Parallelogram Side Theorem Given ABCD is a parallelogram.
Prove: AB CD and BC DA
Angles Segments Triangles Statements Reasons
del of parallelogram
unique line postulate
del of alt, interior angles
alternate interior angles theorem
B
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Statements
✓ 1. ABCD is a parallelogram
Reasons
1. given
A
Think about the properties of a
parallelogram

Select the correct answer. in the figure, angle k measures 45°. what is the measurement of angle c? a. 38° b. 45° c. 90° d. 98°

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