Guess My Rule Alignment Lesson Day 42
Let’s Review Triangles
The Triangle Song
intersect or meet to form right angles
always are the same distance apart and never touch
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?
Scalene Classify by the length of their sides Isosceles Equilateral Triangles Acute Classify by the measure of the angles 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 • Watch as I model a game of Guess my Rule
Guess My Rule • • • • • • 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. Think of two different characteristics of shapes. These characteristics will become your imaginary “rules”.
Place a few shapes in each side or the middle of the diagram according to your rules.
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.
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.
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.
Word Bank of Math Vocabulary
Right Angle Obtuse Angle Acute Angle Triangle Isosceles Triangle Acute Triangle Quadrilateral Square Scalene Triangle Trapezoid Congruent Parallelogram Rectangle Rhombus Kite Hexagon Equilateral Triangle Octagon Pentagon Perpendicular Adjacent Parallel Angle Sides Diagonals