# Refresh chapter 8 + 10

Refresh chapter 8 + 10
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Slide 1: Slide
WiskundeMiddelbare schoolhavoLeerjaar 2

This lesson contains 15 slides, with interactive quizzes and text slides.

Lesson duration is: 45 min

## Items in this lesson

Refresh chapter 8 + 10

#### Slide 1 -Slide

Give the formula for the area of a triangle.

#### Slide 2 -Open question

Give the formula for the area of a paralellogram

#### Slide 3 -Open question

Give the formula for the area of a circle

#### Slide 4 -Open question

Give the formula for the area of a trapezium

#### Slide 5 -Open question

Give the formula for the volume of a
prism

#### Slide 6 -Open question

Give the formula for the volume of a cone/pyramid

10.4 Enlargeming

#### Slide 8 -Slide

Enlargements
In an enlargement of a figure:
- all angles stay the same
- all dimensions (length, width,
height, etc) are multiplied with the same number (called the scale factor)

Triangle B is an enlargement of triangle A with scale factor 2
Triangle D is an enlargement of triangle A with a scale factor 0.5
Triangle F is an enlargment of triangle A with a scale factor of 3
Triangles C and E are NOT  enlargements of triangle A

#### Slide 9 -Slide

Enlarging in two dimensions
What is the scale factor here?

#### Slide 10 -Slide

Enlarging in 3 dimensions
How many small cubes will fit in the rubix cube?

#### Slide 11 -Slide

A cube will be enlarged with a factor 3.
The volume will be ...... times bigger.
A
3 times
B
6 times
C
9 times
D
27 times

#### Slide 12 -Quiz

What formula is used for enlarging the volume?
A
factor^2 x volume original
B
factor^3
C
factor^3 x surface original
D
factor^3 x volume origineel

#### Slide 13 -Quiz

What is the volume of the enlarging
in ?
dm3
A
262.44
B
145.8
C
58.32
D
81

#### Slide 14 -Quiz

A cube has a volume of 27cm³.
This cube will be enlarged by factor 2.
What is the volume of the bigger cube??
timer
1:00
A
216cm³
B
54cm³
C
108cm³