1. MATH: Unit 6 2D Figures 10 Days
Classify two-dimensional figures into categories based on their properties.
G.3 Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.
G.4 Classify two-dimensional figures in a hierarchy based on properties(polygons, triangles, and quadrilaterals).

2. MATH: Unit 6 2D Figures New Knowledge: The students will know
·         attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category
and the following vocabulary words
·         irregular
·         regular
New Skills:
The students will be able to
sort polygons and non-polygons into given categories according to shared attributes (e.g., at least one right angle, at least one pair of parallel sides, at least one obtuse angle, equal sides, etc.)  (G.3)
sort polygons and non-polygons into different categories according to shared attributes and explain the criteria for sorting (e.g., all the shapes in this group are quadrilaterals because they have four sides) (G.3)
create subcategories within  a larger category according to shared attributes (e.g., create a category of triangles, then within that category have subcategories of isosceles and right triangles that further sort the triangles by sides or angles) (G.3)
use graphic organizers to record results of sorting and list attributes that apply to figures within the categories (G.3)
classify polygons as regular or irregular (G.3)
classify two-dimensional figures in a hierarchy according to properties (e.g., see the hierarchy examples below) (G.4)

3. Welcome back! Please have the following things on your desk:
Math spiral (open to a clean page)
Pencil
Snack
Write the date on the top of your page
Attach the Unit 6 Review Sentences page and try to complete (use your notes from Friday to help)

4. Unit 6 REVIEW SENTENCES A square is always a r and a r .
A trapezoid is always a q .
A rhombus is always a p .
A trapezoid is never a p .
5. A polygon with sides that are all congruent is called a _____________polygon.
6. An equilateral triangle and a square are always ________polygons.
7. An isosceles triangle, a scalene triangle, and rectangles are NEVER _________ polygons.

5. UNIT 6: 2D Figures OBJECTIVES
POLYGONS
2-dimensional shapes
made of at least 3 straight lines
"closed" (all the lines connect up)
NOT a POLYGON
2D shape with a curve and/or open side (s)
Polygon  (straight sides)
Not a Polygon  (has a curve)
Not a Polygon  (open, not closed)

6. UNIT 6: 2D Figures OBJECTIVES
REGULAR POLYGONS
All sides are equal (congruent)
All angles are equal (congruent)
IRREGULAR POLYGONS
Sides are unequal
Angles are unequal

7. Group Practice
REGULAR vs. IRREGULAR POLYGON Circle the figures that are regular polygons. Explain why the one figure not circled is an irregular polygon.

8. Group Practice
REGULAR vs. IRREGULAR POLYGON Circle the triangles that are regular polygons. Explain why the one triangle not circled is an irregular polygon.

9. UNIT 6: 2D Figures OBJECTIVES
TRIANGLES
Equilateral - all _______and ________are
equal (congruent)
Isosceles- sides and ____angles
are equal (congruent)
Scalene - all sides and angles are
______________

10. UNIT 6: 2D Figures OBJECTIVES
TRIANGLES – draw an example of each
Obtuse- one obtuse angle (> 90)
Acute- all acute angles (< 90)
Right - one right angle (=90)

11. Group Practice Label the following triangles as
Equilateral, Isosceles, Scalene & acute, obtuse, or right
_______________ 4) _________________
_______________ ________________
2) ________________ 5) ________________
_______________ _______________
3) ________________ 6) _______________

12. UNIT 6: 2D Figures OBJECTIVES
QUADRILATERALS
Polygons with 4 sides and 4 vertices
The sum of the interior angles = 360

13. UNIT 6: 2D Figures Classifications of Quadrilaterals
trapezoid - at least one pair of opposite sides
are ________________
Isosceles Trapezoid - one pair of parallel sides;
the two other sides are of equal length; the vertex
angles, at the end of each parallel side are of equal measure
quadrilateral - __________ pairs of opposite sides are parallel ; opposite angles of equal measure
rhombus - _____ sides of equal length ;
opposite angles of equal measure
rectangle - opposite sides of equal ________;
each angle is a ________angle
square - _____ sides of equal length ;
each angle is a _________angle

14. UNIT 6: 2D Figures
Classify this figure by its attributes List Facts Here

15. UNIT 6: 2D Figures
Classify the figure below based on its attributes

16. UNIT 6: 2D Figures OBJECTIVES
Hierarchy of Quadrilaterals

17. Group Practice
Use your notes to fill in the blank spaces What shape belongs in place of the blank in this hierarchy? Polygons Triangles Isosceles ________ Scalene

18. Group Practice
Use your notes to fill in the blank spaces What shape belongs in place of the blank in this hierarchy? POLYGON ___________________ Trapezoid Parallelogram _______ Rhombus Square

19. Independent Practice TEST on Wednesday 3/23 Unit 6: 2D Shapes
Big Book pages (complete in class and at home for practice)
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