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Question 1: How many sides does a quadrilateral have?
Solution: A quadrilateral has 4 sides.
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Question 2: What is the sum of the angles in a quadrilateral?
Solution: The sum of the angles in a quadrilateral is $360^\circ$.
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Question 3: A quadrilateral with both pairs of opposite sides parallel is called a?
Solution: Parallelogram.
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Question 4: What is a parallelogram with all four sides equal called?
Solution: A rhombus.
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Question 5: What is a parallelogram with all four angles equal to $90^\circ$ called?
Solution: A rectangle.
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Question 6: A rectangle with all four sides equal is called a?
Solution: A square.
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Question 7: In a parallelogram, opposite sides are ________.
Solution: Equal and parallel.
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Question 8: In a parallelogram, opposite angles are ________.
Solution: Equal.
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Question 9: The diagonals of a parallelogram ________ each other.
Solution: Bisect.
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Question 10: Three angles of a quadrilateral are $75^\circ, 90^\circ$ and $75^\circ$. Find the fourth angle.
Solution: The fourth angle is $360^\circ - (75^\circ + 90^\circ + 75^\circ) = 360^\circ - 240^\circ = 120^\circ$.