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Describe and analyze properties of two-dimensional shapes. Grade 3. Big Idea 3. Group Norms and Housekeeping. Group Norms: Participate Ask questions Work toward solutions Limit side bars Listen with an open mind. Logistics: Rest Rooms Phone Calls Breaks Lunch Punctuality Sharing. - PowerPoint PPT Presentation
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Grade 3
Describe and analyze properties of two-dimensional shapes.
Group Norms and Housekeeping
Group Norms:
Participate
Ask questions
Work toward solutions
Limit side bars
Listen with an open mind
Logistics:
Rest Rooms
Phone Calls
Breaks
Lunch
Punctuality
Sharing
Let’s Warm-up!!What kind of a tree does a math teacher climb?
What’s a polygon?
Which triangles are the coldest?
Where can you buy a ruler that is 3 feet long?
A Geome-tree
A dead parrot
Ice-sosceles
A yard sale
MA.3.G.3.1:
Describe, analyze, compare, and classify two-dimensional shapes using sides and angles - including acute, obtuse, and right angles - and connect these ideas to the definition of shapes.
Content Limits: Items may include regular and irregular polygons with 3, 4, 5, 6, 8, or 10 sides.
Polygons used in items may be concave or convex.
Polygons used in items may include types of triangles (right, equilateral, isosceles, and scalene), types of quadrilaterals (parallelogram, trapezoid, rectangle, rhombus, square, and/or kite), pentagons, hexagons, octagons, and decagons.
Polygons may be classified by use of parallel or perpendicular sides as well as number of sides and/or types of angles.
Items may assess the specific names of polygons with 3, 4, 5, 6, 8, or 10 sides and the following terms: regular and irregular polygons, lines and line segments (parallel and perpendicular), diagonals, and vertices (vertex).
Items will not include defining or identifying the following vocabulary terms: concave and convex.
Types of angles will not be assessed in isolation at this benchmark.
FCAT Sample Question
MA.3.G.3.2:
Compose, decompose, and transform polygons to make other polygons, including concave and convex polygons with three, four, five, six, eight, or ten sides.
Remark/Examples:
Example: With pattern blocks, a trapezoid and a triangle can be combined to form a parallelogram or a large triangle. Also, the hexagon can be decomposed to form two trapezoids, and so forth.
Example: One can cut a triangle off of a parallelogram so that, when translated and attached to the other side, the parallelogram becomes a rectangle.
Content Limits: Items may include concave or convex polygons with 3, 4, 5, 6, 8, or 10 sides.
Items may include the use of transformations to create new polygons, but the transformation (i.e., rotations, translations, reflections, dilations) will not be assessed.
Geometric terms will be used with common terminology set in parentheses, i.e., reflection (flip).
Items may use the following terms: overlapping, combine, and polygon.
Items will not assess the following vocabulary terms: concave, convex, compose, or decompose.
FCAT Sample Question
MA.3.G.3.3:
Build, draw, and analyze two-dimensional shapes from several orientations in order to examine and apply congruence and symmetry.
Content Limits: Items may include concave or convex polygons with 3, 4, 5, 6, 8, or 10 sides.
Items should use the correct geometric term with common terminology set in parentheses, i.e., reflection (flip). Items may assess the following terms: symmetry, reflection, and/or congruent.
Transformations may be used in graphics; however, the transformations needed to compose or decompose polygons (rotations, translations, dilations) will not be assessed.
FCAT Sample Question
Big Idea 3 Video Podcast
MA.3.G.3.1Describe, analyze, compare, and classify 2-dimensional shapes using sides and angles-including acute, obtuse,
and right angles-and connect these ideas to the definition of shapes.
What is a polygon?
polygon polygon polygon
polygon
Not a polygon
Not a polygon
Not a polygon
Not a polygon
Regular Polygons
A regular polygon is a polygon whose sides are all the same length, and whose angles are all
the same.
Are these regular polygons? Why or why not?
A: No…These sides are all the different lengths,
and the angles are all different.
04/19/23
Two Ways to Classify Triangles
By Their Sides
By Their Angles
Acute???Acute Triangles Not Acute Triangles
Definition:
Isosceles???Isosceles Triangles Not Isosceles Triangles
Definition:
04/19/23 22
Scalene Triangles
No sides are the same length
Isosceles TrianglesAt least two sides are the same
length
Acute TrianglesAcute triangles have three acute
angles
Right TrianglesRight triangles have one right
angle
What about the other two angles?
ObtuseTrianglesObtuse triangles have one obtuse
angle
What about the other two angles?
Let’s Play…..
NAME THAT TRIANGLE!!
NAME THAT TRIANGLE!!
Answer: Right Scalene Triangle
NAME THAT TRIANGLE!!
Answer: Obtuse Isosceles Triangle
NAME THAT TRIANGLE!!
Answer: Acute Scalene Triangle
Geogebra
Quadrilateral
Parallelogram
Trapezoid
RectangleRhombus
Square
Kite
What are all of the names for this What are all of the names for this polygon?polygon?
Quadrilateral
Parallelogram
Rectangle
Which name best describes the shape?
What are all of the names for this What are all of the names for this polygon?polygon?
Quadrilateral
Parallelogram
Which name best describes the shape?
What are all of the names for this What are all of the names for this polygon?polygon?
Quadrilateral
Parallelogram
Rhombus
Which name best describes the shape?
What are all of the names for this What are all of the names for this polygon?polygon?
Quadrilateral
Trapezoid
Which name best describes the shape?
What are all of the names for this What are all of the names for this polygon?polygon?
Quadrilateral
Parallelogram
Square
Rhombus
Rectangle
Which name best describes the shape?
Quadrilateral Flow Chart
Let’s Go Fly a Kite!!
Kite Not a Kite
Is this a kite?
YES!
Is this a kite?
NO!
Grab and Go Activity 9.7
Dot Paper
MA.3.G.3.2Compose, decompose, and transform polygons to make other polygons, including concave and convex polygons
with three, four, five, six, eight, or ten sides.
Concave or Convex?
Convex ConvexConcaveConcave
Tangrams
Grab and Go Activity 10.1
Compose Hexagons
MA.3.G.3.3Build, draw, and analyze 2-Dimensional shapes from several orientations in order to examine and apply
congruence and symmetry.
Using Geoboards to show Symmetry
Grab and Go Activity 10.9
Dot Paper
Ticket Out 3 – 2 - 1
Fold your paper into three columns
Write: 3 things you learned from
this workshop 2 things you will use in
your classroom 1 way the workshop can
be improved