Refresh chapter 8 + 10

• Wiskunde
• Middelbare school
• havo
• Leerjaar 2

Refresh chapter 8 + 10

Give the formula for the area of a triangle.

Give the formula for the area of a paralellogram

Give the formula for the area of a circle

Give the formula for the area of a trapezium

Give the formula for the volume of a
prism

Give the formula for the volume of a cone/pyramid

10.4 Enlargeming

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

Enlarging in two dimensions

What is the scale factor here?

Enlarging in 3 dimensions

How many small cubes will fit in the rubix cube?

A cube will be enlarged with a factor 3.
The volume will be ...... times bigger.

1. 3 times
2. 6 times
3. 9 times
4. 27 times

What formula is used for enlarging the volume?

1. factor^2 x volume original
2. factor^3
3. factor^3 x surface original
4. factor^3 x volume origineel

What is the volume of the enlarging
in ?

dm​3​​

1. 262.44
2. 145.8
3. 58.32
4. 81

A cube has a volume of 27cm³.
This cube will be enlarged by factor 2.
What is the volume of the bigger cube??

1. 216cm³
2. 54cm³
3. 108cm³