Parallel Lines and Parallelograms

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Parallel Lines and Parallelograms

• Draw and explain parallel lines.
• Draw and define parallelograms.

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What is a parallel line?
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What is a parallel line?

• Parallel lines never cross.

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What is a parallelogram?
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A parallelogram has four sides, and opposite
sides are parallel.
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A parallelogram has four sides, and opposite
sides are parallel.
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• Parallel

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Measure the length of opposite sides on
parallelograms A, B, and C
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What parallelograms can you find in our classroom?
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Parallelograms and Rectangles
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What makes them different from each other?
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Look at the shapes on page 132.

• Are some of these parallelograms also rectangles?
  

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Look at the shapes on page 132.

• Are some of these parallelograms also rectangles?
• Which ones?

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Look at the shapes on page 132.

• The other parallelograms are not rectangles. How
  do these parallelograms differ from rectangles?

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Look at the shapes on page 132.

• How are all parallelograms like rectangles?

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Do page 132

• Draw skinny and fat parallelograms.
• Draw some with square corners.
• Draw some with non-square corners and sides that
  slant differently.

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Visual Thinking

• Can you find the hidden parallelograms?

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Visual Thinking

• Can you find the hidden parallelograms on page
  133?

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• Parallel

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• Parallelograms

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Relate Different Quadrilaterals

• Todays Goal Describe quadrilaterals,
  parallelograms, rectangles, and squares.
• Categorize quadrilaterals.
• Describe how quadrilaterals are alike and
  different

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Vocabulary

• quadrilateral
• parallelogram
• rectangle
• right angle
• square

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Quadrilaterals

• Draw a square.
• Draw a rectangle.
• Draw a parallelogram.
• Draw another shape with 4 sides

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What do all of these shapes have in common?

• Draw a square.
• Draw a rectangle.
• Draw a parallelogram.
• Draw another shape with 4 sides

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All of these shapes have 4 sides and each side is
a line segment.

• square
• rectangle
• parallelogram
• quadrilateral

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All of these shapes are quadrilaterals!
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Quadri means four latus means sides

• square
• rectangle
• parallelogram
• quadrilateral

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Quadrilateral means 4 sides.

• square
• rectangle
• parallelogram
• quadrilateral

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Draw 4 parallelograms on your board.

• What is a parallelogram?
• Are all parallelograms quadrilaterals?
• Are all quadrilaterals parallelograms?

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Draw 3 rectangles on your board.

• What is a rectangle?
• Are all rectangles quadrilaterals?
• Are all quadrilaterals rectangles?
• Are all rectangles parallelograms?
• Are all parallelograms rectangles?

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Draw 3 squares on your board.

• What is a square?
• Are all squares quadrilaterals?
• Are all quadrilaterals squares?
• Are all squares parallelograms?
• Are all parallelograms squares?
• Are all squares rectangles?
• Are all rectangles squares?

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Sort Quadrilaterals

• Cut out the shapes on page 135.
• Separate the shapes into quadrilaterals and not
  quadrilaterals.
• Which shapes are quadrilaterals?
• Why are all of the shapes that you listed
  quadrilaterals?

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Sort Quadrilaterals

• Sort the quadrilaterals into two groups
  parallelograms and not parallelograms
• Which shapes are parallelograms?

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Sort Quadrilaterals

• Sort the quadrilaterals into two groups
  rectangles and not rectangles
• Which shapes are rectangles?

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Sort Quadrilaterals

• Sort the quadrilaterals into two groups squares
  and not squares
• Which shapes are squares?

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Identify Quadrilaterals

• Quadrilateral
• Parallelogram
• Rectangle
• square

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Identify Quadrilaterals

• Quadrilateral
• Parallelogram
• Rectangle
• square

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Identify Quadrilaterals

• Quadrilateral
• Parallelogram
• Rectangle
• square

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Now it is your turn!

• Do page 137.
• Place a check mark beside each word that names
  the shape.