6.4 Rhombus, Rectangles 6.4 Rhombus, Rectangles and Squaresand Squares

Special Parallelograms

Rhombus- all sides are congruent

Rectangle – all interior angles are Right angles

Square – All angles are Right and all sides congruent

Theorem

In a Rhombus the diagonals are perpendicular.

Theorem

In a Rhombus, opposite angles are bisected by the diagonal touching both opposite angles.

BCEDCEBAEADECBEABECDEADE

Theorem

In a Rectangle diagonals are congruent.

BDAC

Answers are Always, Sometimes or Never

#1. A Rectangle is a Square.

#2. A square is a Rhombus

EFGH is a Rectangle

K is the midpoint of FH. EG = 8z – 16Find EK

E F

GH

K

Some QuestionsWhat is another name for an equilateral quadrilateral?

Which quadrilaterals have the given property

All sides are congruent?

All angles are congruent?

The diagonals are congruent?

Opposite angles are congruent?

Some QuestionsWhat is another name for an equilateral quadrilateral?

Which quadrilaterals have the given property

All sides are congruent?

All angles are congruent?

The diagonals are congruent?

Opposite angles are congruent?

Some QuestionsWhat is another name for an equilateral quadrilateral?

Which quadrilaterals have the given property

All sides are congruent?

All angles are congruent?

The diagonals are congruent?

Opposite angles are congruent?

Some QuestionsWhat is another name for an equilateral quadrilateral?

Which quadrilaterals have the given property

All sides are congruent?

All angles are congruent?

The diagonals are congruent?

Opposite angles are congruent?

Some QuestionsWhat is another name for an equilateral quadrilateral?

Which quadrilaterals have the given property

All sides are congruent?

All angles are congruent?

The diagonals are congruent?

Opposite angles are congruent?

Some QuestionsWhat is another name for an equilateral quadrilateral?

Which quadrilaterals have the given property

All sides are congruent?

All angles are congruent?

The diagonals are congruent?

Opposite angles are congruent?

Homework Homework Page 351 – 352 Page 351 – 352 ##12 – 43,12 – 43,

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