# DB1M 26-5

7.4 Special Quadrilaterals
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Slide 1: Slide
WiskundeMiddelbare schoolhavoLeerjaar 1

This lesson contains 19 slides, with interactive quizzes and text slides.

Lesson duration is: 45 min

## Items in this lesson

7.4 Special Quadrilaterals

Planning
• New theory
• Quiz

Parallelogram

#### Slide 3 -Mind map

Parallelogram
Write down:
A parallelogram is a quadrilateral where both pairs of opposite sides are parallel.

#### Slide 4 -Slide

Write down:
• Has point symmetry
• Opposite sides have the same length
• Diagonals divide each other in half
• Opposite angles are equal
Properties of a parallelogram

#### Slide 5 -Slide

Write down:
A rhombus is a quadrilateral with four equal sides.
Which foto is a rhombus?
A
B
C
D

#### Slide 6 -Quiz

Write down:
• Diagonals are the axes of symmetry
• Diagonals are perpendicular
• Diagonals are bisectors of te angles
• All properties of a parallelogram
Properties of a rhombus

#### Slide 7 -Slide

Trapezium
Write down:
A trapezium is a quadrilateral where at least one pair of opposite sides is parallel.

#### Slide 8 -Slide

Wat do you notice?
Isosceles trapezium

#### Slide 9 -Slide

Write down:
An isosceles triangle has one axis of symmetry.
Isosceles trapezium

What do you see?
A
Teddy bear
B
Kite
C
Flag

#### Slide 11 -Quiz

Kite
Write down:
A kite is a quadrilateral where at least one diagonal is an axis of symmetry.

Quiz

What is this?
A
Parallelogram
B
Trapezium
C
Kite
D
Rhombus

#### Slide 14 -Quiz

What is this?
A
Trapezium
B
Isosceles trapezium
C
Kite
D
Parallelogram

What is this?
A
Parallelogram
B
Trapezium
C
Kite
D
Rhombus

#### Slide 16 -Quiz

What is this?
A
Parallelogram
B
Trapezium
C
Isosceles trapezium
D
Kite

What is this?
A
Parallelogram
B
Trapezium
C
Kite
D
Rhombus

#### Slide 18 -Quiz

What do you want for homework?
The whole paragraph 7.4
Ex. 39, 44, 48, 49, 51 on page 62