1. Warm Up
Rachel and Sierra were comparing the lids of their jewelry boxes. Rachel and Sierra both argued that only their lid had at least one set of perpendicular diagonals. Sandra was listening to the girls discuss their lids and had them use yarn to make diagonals on them. She noticed both girls had lids that had all sides congruent. With Sandra’s help the girls realized that they both had lids with at least one set of perpendicular diagonals. What are the possible lids the girls may have had on their jewelry boxes?

2. Compare and Contrast Polygons Unit 4, Lesson 3

3. Let’s Review Triangles
The Triangle Song

4. Vocabulary
Perpendicular lines - lines that form 90° angles when they intersect (cross)
Parallel lines – lines that are equal distance apart and never touch

5. Vocabulary
Congruent – same size, same shape

6. Vocabulary
Quadrilateral - a polygon with four sides

7. Vocabulary Parallelogram - a polygon with two pairs of parallel sides
A rectangle is a parallelogram
A rhombus is a parallelogram
A square is a parallelogram

8. Vocabulary
Square - a parallelogram with all sides the same length and all right angles
Diagonals are congruent
Diagonals are perpendicular
A quadrilateral

9. Vocabulary Rectangle - a parallelogram with all right angles
Diagonals are congruent
Opposite sides are congruent

10. Vocabulary Rhombus - a parallelogram with all sides the same length
Diagonals are NOT congruent
Diagonals are perpendicular

11. Vocabulary
Trapezoid – a quadrilateral with ONLY one pair of parallel sides
Right trapezoid - a trapezoid with right angles

12. Vocabulary
Pentagon - a polygon with five sides

13. Vocabulary
Hexagon - a polygon with six sides

14. Vocabulary
Octagon – a polygon with eight sides

15. Compare Polygons
What is similar and different about these two shapes? Use precise vocabulary!! 

16. Activity Book Cut out shapes on page 162A in your activity book
DO NOT cut the actual shape…cut only the boxes
Use these shapes to complete the table on Day 41, “Comparing Polygons Table”
Record the attributes and definitions of each shape
In the ‘Shape Letters’ column, write letters of the shapes that correspond with the vocabulary word!
The chart is on the next slide! 

17. Name Shape Letters Definition
acute triangle
equilateral triangle
scalene triangle
isosceles triangle
obtuse triangle
octagon
parallelogram
pentagon
quadrilateral
rectangle
rhombus
right trapezoid
hexagon
square

18. Find Day 41, “Polygon Capture Rules of the Game”
Before You Play: Cut up the Polygon Capture Cards, shuffle and place face down. Take one persons shapes from page 162A and place them face up all around the deck of cards. How to Play: 1. Player 1 turns over one card from the deck. All polygons that match both these properties may be captured. Captured polygons are removed from play and placed beside player If player 1 has missed any figures, player 2 may now capture them. 3. Player 2 chooses a card from each deck and tries to capture polygons. If no polygons can be captured with the card chosen, the player may choose one more card from the deck. If no polygons can then be captured, that turn is over. A player may challenge the opponent's capture. If the piece was incorrectly chosen, it is put back in play in the center. Play until two or fewer polygons remain. If you run out of cards, reshuffle the deck. The player with the most polygons wins.

19. Rules Continued
Steal Card: If you select the Steal Card, pick two properties, one for sides and one for angles, that will allow you to steal as many polygons from your opponent as possible. Make up these properties on your own. If your opponent has no cards to steal, put the Steal Card back in the angle deck and your turn ends. Example: Player 1 turns over the card At least one angle is a right angle and only one pair of sides are parallel. Player 1 captures shape P. Player 2 may now capture shape H, since it was missed by player 1. Player 2 now turns over a card.

20. Remaining Time/Homework
Day 41, “Compare Polygons Journal Prompt”
Day 41, “Comparing Polygons Homework”