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5th grade · Math · Unit 8 of 15

Parallel Lines and Quadrilaterals

Sort four-sided shapes

What your child practices

Finding parallel and perpendicular edges and sides, and sorting quadrilaterals (rectangles, squares, trapezoids, parallelograms and rhombuses) by their sides and angles.

Alabama Course of Study content standard: 5.22; 5.23 · classifying quadrilaterals in a hierarchy by their properties

How we explain it

Children can open this short lesson before they practice.

  1. Parallel lines stay the same distance apart and never meet.
  2. Perpendicular lines meet at a right angle.
  3. Sort quadrilaterals by parallel sides and equal sides.

Example: A quadrilateral has two pairs of parallel sides and four right angles. What could it be? Two pairs of parallel sides: a parallelogram. Four right angles: a rectangle. Answer: A rectangle

Parallel Lines and Quadrilaterals in Alabama

In the Alabama Course of Study, this is unit 8 of 15 in 5th grade Math, after Mental Math Tricks and before Triangles & Moves.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: Alabama State Department of Education (ALSDE)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    A rhombus has…

    • only two equal sides
    • four equal sides
    • three equal sides

  2. Question 2

    Which shape is NOT a quadrilateral?

    • a pentagon
    • a rhombus
    • a square

  3. Question 3

    Parallel lines are lines that…

    • cross at a square corner
    • touch at one point
    • never cross

  4. Question 4

    Every square is also a…

    • rectangle
    • triangle
    • trapezoid with no parallel sides

  5. Question 5

    A parallelogram has…

    • no parallel sides
    • exactly one pair of parallel sides
    • two pairs of parallel sides

  6. Question 6

    A rectangle is not a rhombus unless it is also a…

    • triangle
    • square
    • trapezoid

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