Quadrilaterals

Today’s LessonTitle new page: Quadrilaterals

Date: 10/13/09Get a calculator!

Review – Stem & Leaf

Yesterday’s Assignment

On overheadGiven 28 squares for the perimeter, make a garden with the biggest area.

Essential QuestionHow can I identify and describe quadrilaterials?

QuadrilateralsSketch the ones you see in your notes.

We’ll talk about them later.

Quadrilateral:

Quadrilateral:

Quadrilateral:

Quadrilateral:

Quadrilateral:

Quadrilateral:

QuadrilateralWhat do they all have in common?

What differences did you see?

Square:

Square:Sides?4 equalBoth sets parallel

Angles?All are 90o

Rhombus:

Rhombus:Sides?4 equalBoth sets parallel

Angles?2 obtuse, 2 acute

Rectangle:

Rhombus:Sides?Opposites equal

Both sets parallel

Angles?All are 90o

Parallelogram:

Parallelogram:Sides?Opposites equal

Both sets parallel

Angles?2 obtuse, 2 acute

Trapezoid:

Trapezoid:Sides?One set parallel

Angles?2 obtuse, 2 acute (in this one)

Trapezoid:

Angle Measures:What do you think the total angle measurement is for a quadrilateral?

Trapezoid:

Essential QuestionHow can I identify and describe quadrilaterals by their sides and angles?

Assignment:Sorting quadrilaterals.

Use chartIdentify each shape as one of the quadrilaterals or just quadrilateral

More Problems:Quiz on non-calculator items.

Model drawing if time.