Warm Up

• Jarod and Wake were building a castle using blocks. They began discussing the parallel sides on each of their quadrilaterals. Jarod said that all of the shapes had 2 sets of parallel sides. Wade told him that he was wrong. Who is correct? Explain why.

Guess My RuleAlignment Lesson

Let’s Review Triangles

The Triangle Song

intersect or meet to form right angles

always are the same distance apart and

never touch

Perpendicular lines

Parallel lines

90 degrees

(90°)

Angles greater than 90 degrees ( >90°)

Angles less than 90

degrees (< 90°)

Equilateral triangle

Isosceles triangle

An equilateral triangle has all congruent sides An isosceles triangle has

all at least two congruent sides

Vocabulary Review

• Quadrilateral - a polygon with four sides

Vocabulary Review

• Parallelogram - a polygon with two pairs of parallel sides

• A rectangle is a parallelogram• A rhombus is a parallelogram• A square is a parallelogram

Vocabulary Review

• Square - a parallelogram with all sides the same length and all right angles– Diagonals are congruent– Diagonals are perpendicular– A quadrilateral

Vocabulary Review

• Rectangle - a parallelogram with all right angles– Diagonals are congruent– Opposite sides are congruent

Vocabulary Review

• Rhombus - a parallelogram with all sides the same length

• Diagonals are NOT congruent• Diagonals are perpendicular

Vocabulary Review

• Trapezoid – a quadrilateral with ONLY one pair of parallel sides

• Right trapezoid - a trapezoid with right angles

Vocabulary Review

• Pentagon - a polygon with five sides

Vocabulary Review

• Hexagon - a polygon with six sides

Vocabulary Review

• Octagon – a polygon with eight sides

Vocabulary Review

• Kite - A quadrilateral with two distinct pairs of congruent, adjacent sides and diagonals that intersect at a right angle.

What are ways to classify triangles?

Triangles

Classify by the length of their

sides

Scalene

Isosceles

Equilateral

Classify by the measure of the

angles

Acute

Right

Obtuse

Which types of quadrilaterals can be classified as parallelograms?

• Square

• Rectangle

• Rhombus

• Is a trapezoid a parallelogram? Why or why not?

• NO!!! A trapezoid is not a parallelogram because it only has ONE PAIR of PARALLEL SIDES!

• What are the characteristics of a regular polygon?

• All angles are congruent!• All sides are congruent!

Guess My Rule

• Find Day 42, “Guess My Rule Shapes”

• Quickly cut out the shapes.

• You don’t have to cut on each line. Just cut around the shapes.

• On your white boards, draw a T chart. Mark one side as “Yes” and the other side as “No”

Characteristics of Shapes

• I’m going to give you some characteristics and you must move 4-5 shapes under the “Yes” and “No” columns depending on whether or not it fits that characteristic.

• 1st characteristic – opposite sides parallel• Share the shape numbers/names you put

under the “Yes” column. Give viable arguments to prove your case!

• What about the “No” column??

Continue with More Shape Characteristics (move on chart according to each

characteristic)• Opposite sides congruent• At least one obtuse angle• At least one right angle• All sides congruent• All angles congruent• Two consecutive sides congruent• Parallelogram• Regular polygon• Opposite Angles Congruent• Has 4 sides• Isosceles

Materials Needed for Game

• Your shapes you just cut out

• Grouping circles or Day 42, “Venn Sorting Hoops”

• We will go over instructions of the game and then I will model it for you!

Guess My Rule Game Instructions• Purpose: Your goal is to have your partner guess your “rules” by

naming shape numbers that fit into each side (or the middle) of a Venn diagram.

1. Think of two different characteristics of shapes. These characteristics will become your imaginary “rules”.

2. Place a few shapes in each side or the middle of the diagram according to your rules.

3. Keep adding shapes on the diagram until your partner thinks he/she is ready to try and place a shape him/herself correctly in the diagram.

4. If your partner thinks he/she knows the rule, prove it only by naming a shape that fits the rule and not by telling the rule.

5. Don’t reveal your rules until all shapes have been sorted correctly!

Math Talk

• Let’s discuss the “sorts” you created today.• As you explain your sorts, use the math

vocabulary we have discussed.

Right Angle Obtuse Angle Acute Angle Triangle Scalene Triangle

Isosceles Triangle Acute Triangle Quadrilateral Square Trapezoid

Parallelogram Rectangle Rhombus Kite Congruent

Hexagon Octagon Perpendicular Parallel Sides

Equilateral Triangle Pentagon Adjacent Angle Diagonals

Word Bank of Math Vocabulary

Homework – Due Thursday

Day 42, “Polygon Journal Prompt”