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Quadrilaterals

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Quadrilaterals By Mr. Bales Objective By the end of this lesson, you will be able to identify, describe, and classify quadrilaterals. Standard 4MG3.8 - Know the ... – PowerPoint PPT presentation

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Title: Quadrilaterals


1
Quadrilaterals
  • By Mr. Bales

2
Objective
  • By the end of this lesson, you will be able to
    identify, describe, and classify quadrilaterals.
  • Standard 4MG3.8 - Know the definitions of
    different quadrilaterals (rhombus, square,
    rectangle, parallelogram, trapezoid).

3
Introduce
  • Using the straws and tie wraps, you will be
    making shapes.
  • Please follow the directions carefully.
  • After each shape, we will take it apart before we
    begin the new one.

4
Shape 1
  • Using four straws of the same length, make a
    quadrilateral with all four sides equal in length
    and all right angles.
  • What is this shape called?
  • Now, pull two opposite corners of the square in
    opposite directions.
  • Are the angles still right angles?
  • Are the pairs of opposite sides still the same
    length?
  • What is this new shape called?

5
Square vs. Rhombus
  • A square has four right angles, with opposite
    sides parallel. All sides are equal length.
  • A rhombus has 4 equal sides and opposite sides
    are parallel.

6
Shape 2
  • Now, use two straws of one length and two straws
    of another length. Make a quadrilateral with the
    pairs of opposite sides the same length and all
    right angles.
  • What is this shape called?
  • Pull two opposite corners of the shape in
    opposite directions. Are the angles still right
    angles?
  • Are the pairs of opposite sides still the same
    length?
  • What is the new shape called?

7
Rectangles vs. Parallelograms
  • A rectangle has 4 right angles, with opposite
    sides equal and parallel.
  • A parallelogram has opposite sides equal in
    length and parallel.

8
Shape 3
  • Using two straws of one length for the sides of
    the shape, and two completely different sized
    straws for the top and bottom, and make this
    quadrilateral. (So you should use 3 different
    straw lengths - same two sized for the sides -
    different one for top - and another different
    one for bottom.
  • What quadrilateral is this?

9
Trapezoid
  • A trapezoid has at least 1 pair of parallel sides.

10
Bales Bucks!!!
11
Assignment
  • Page 412 - s 8 - 21
  • Get them all correct, No Math Homework
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