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Parallelism, Perpendicularity, and Parallelograms 2
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Result
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Choose the correct answer to each question.

1. How do you describe any two opposite angles in a parallelogram?
They are congruent.
They are complementary.
They are supplementary.
They are both right angles.
Answer: They are congruent.
2. What can you say about any two consecutive angles in a parallelogram?
They are congruent.
They are complementary.
They are supplementary.
They are both right angles.
Answer: They are supplementary.
3. Which of the following conditions is not sufficient to prove that a quadrilateral is a parallelogram?
Two sides are parallel.
Two sides are congruent.
Two angles are supplementary.
Two diagonals bisect each other.
Answer: Two diagonals bisect each other.
4. What is the measure of ∠2 in parallelogram HOME?
75 ∘
90 ∘
105 ∘
180 ∘
Answer: 105 ∘
5. Two consecutive angles of a parallelogram have measures (x+30) ∘ and [2(x−30)] ∘ . What is the measure of the smaller angle?
30 ∘
80 ∘
100 ∘
140 ∘
Answer: 80 ∘
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