Geometry Parallelograms Flashcards

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Questions and Answers

What is a rectangle?

  • A quadrilateral with at least one pair of parallel sides
  • A parallelogram with four right angles (correct)
  • A parallelogram with all sides equal
  • A rectangle with all sides equal and four right angles

What is a rhombus?

  • A shape with four right angles
  • A quadrilateral with one pair of parallel sides
  • A rectangle with all sides equal
  • A parallelogram with all sides equal (correct)

What is a square?

  • A rectangle with all sides equal (correct)
  • A quadrilateral with at least one pair of parallel sides
  • A parallelogram with four right angles
  • All of the above

What is a trapezoid?

<p>A quadrilateral with at least one pair of parallel sides (B)</p> Signup and view all the answers

Match the vocabulary word with the correct definition:

<p>Rectangle = A parallelogram with four right angles Rhombus = A parallelogram with all sides equal Square = A rectangle with all sides equal and four right angles Trapezoid = A quadrilateral with at least one pair of parallel sides</p> Signup and view all the answers

If a pair of opposite sides of a quadrilateral are parallel and equal, what does it constitute?

<p>parallelogram</p> Signup and view all the answers

What can be inferred if the four sides of a quadrilateral are equal?

<p>rhombus</p> Signup and view all the answers

A square is __________ a rhombus.

<p>always</p> Signup and view all the answers

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Study Notes

  • Rectangle: A type of parallelogram characterized by having four right angles.
  • Rhombus: Defined as a parallelogram where all four sides are of equal length.
  • Square: A specific kind of rectangle, distinguished by having both four right angles and all sides equal.
  • Trapezoid: A quadrilateral that has at least one pair of parallel sides.

Vocabulary Matching

  • Rectangle: A parallelogram with four right angles.
  • Rhombus: A parallelogram with all sides equal.
  • Square: A rectangle with all sides equal and four right angles.
  • Trapezoid: A quadrilateral with at least one pair of parallel sides.

Proofs in Geometry

  • Midpoints of a Rectangle: When joining the midpoints of a rectangle's sides (K, L, M, N), the resulting shape KLMN is a parallelogram because if one pair of opposite sides are parallel and equal in length, the figure is classified as a parallelogram.
  • Quadrilateral Being a Rhombus: If a quadrilateral has all four sides equal (AB = BC = CD = DA), it can be proven that the quadrilateral is a rhombus because all quadrilaterals fall under the umbrella of parallelograms.

Rhombus and Square Relationships

  • A square is always considered a rhombus because it meets the criterion of having all sides equal.

Lengths and Properties

  • In a parallelogram (specifically a rectangle), opposite sides are equal. Therefore, if AB is given, then AB = DC.

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