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The cuboid

Source: licencja: CC 0.

Prostopadłościan

Learning objectives

You will learn the structure of the cuboid.

You will learn to calculate the surface area and the volume of the cuboid.

Learning effect

  • You know the structure of the cuboid.

  • You can calculate the surface area and the volume of the cuboid.

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nagranie abstraktu
Task 1

Your task is to observe the most important elements of the cuboidcuboidcuboid.

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Geogebra aplet - Siatka prostopadłościanu. Galeria z opisami alternatywnymi poniżej.
Source: GroMar, licencja: CC BY 3.0.

Then, draw a mind map in your notebook, including: the vertices, the base edges, the face edges, the base diagonals, the face diagonals and the diagonals of the cuboidcuboidcuboid.

Find the properties of the cuboidcuboidcuboid and the cubecubecube.

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nagranie abstraktu

The properties of the cuboidcuboidcuboid:

  • it has 6 faces,

  • all the faces are rectangles,

  • it has 8 vertices,

  • it has 12 edges,

  • there are 3 edges from each vertex.

The properties of the cubecubecube:

  • The cubecubecube is a cuboid, whose all faces have the same length.

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nagranie abstraktu

Recollect the formula for the surface area and the volume of the cuboidvolume of the cuboidvolume of the cuboid and the cubecubecube.

The surface area of the cuboidsurface area of the cuboidsurface area of the cuboid whose edge lengths are a, b, c:

P=2ab+2ac+2bc

The volume of the cuboidvolume of the cuboidvolume of the cuboid whose edge lengths are a, b, c:

V=abc

The surface area of the cubesurface area of the cubesurface area of the cube with edge length is a:

P=6a2

The volume of the cubevolume of the cubevolume of the cube with edge length a:

V=a3

The surface area and the volume of the cube after cutting out the corners.

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Source: GroMar, licencja: CC BY 3.0.
Task 2
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nagranie abstraktu

Calculate the surface area and the volume of the cubevolume of the cubevolume of the cube with a face length of 4 cm, if a corner whose face is 1 cm long has been cut out.

Task 3
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nagranie abstraktu

The cuboidcuboidcuboid, whose edges are 3, 4, 5 long, is given. Draw three different nets of this cuboid.

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Source: GroMar, licencja: CC BY 3.0.
Task 4
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nagranie abstraktu

Calculate the volume and the surface area of the cuboidsurface area of the cuboidsurface area of the cuboid, whose net is presented in the diagram. The edges without dimensions are respectively 2 and 4 times longer than the edge with given length.

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Source: GroMar, licencja: CC BY 3.0.
Task 5
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nagranie abstraktu

The sum of the lengths of all the edges of the cuboidcuboidcuboid equals 76 cm. What is the altitude of this cuboid, if the square whose area is 49 cmIndeks górny 2 is the base of this cuboid?

Task 6
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nagranie abstraktu

Can you put 10 litres of water into the cuboid‑shaped aquarium, whose dimensions are 2,5 dm x 3 dm x 1,5 dm?

Task 7
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nagranie abstraktu

Calculate the surface area of the cubesurface area of the cubesurface area of the cube if the sum of all its edges equals 37,5 cm.

Task 8
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nagranie abstraktu

Calculate the sum of all the edge lengths of the cubecubecube, if its surface area is 11,76 cmIndeks górny 2.

Task 9
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nagranie abstraktu

Extra task:

A cube‑shaped box has the volume of 338 litra. What is the volume of the box, whose edges are three times longer? How much more paper will we use to get the bigger box glued together?

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nagranie abstraktu

Do the consolidation tasks.

Exercises

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Exercise 1
Wersja alternatywna ćwiczenia: Determine which sentences are true. Możliwe odpowiedzi: 1. The edge of the cube whose volume 164 m3 is has the length of 0,125 m., 2. The cube, whose edge length is 3, has the surface area 6 times larger than the cuboid with dimensions 2 x 2 x 4., 3. The cube with the edge length 20 cm will fit 64 cubes, whose edges are 5 cm each., 4. The cube with the edge length 4 has the volume 2 times larger than the cuboid, whose dimensions are 2 x 4 x 4.
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Exercise 2
Wersja alternatywna ćwiczenia: The surface area of the cube whose volume is 216 m3 equals: Możliwe odpowiedzi: 1. 36 m2, 2. 21,6 cm2, 3. 3600 cm2, 4. 216 m2
Exercise 3

Is a cuboid a cube?

Justify your answer in English.

Exercise 4
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Wersja alternatywna ćwiczenia: Indicate which pairs of expressions or words are translated correctly. Możliwe odpowiedzi: 1. prostopadłościan - cuboid, 2. sześcian - cube, 3. siatka prostopadłościanu - net of the cuboid, 4. pole powierzchni prostopadłościanu - surface area of the cuboid, 5. objętość sześcianu - surface area of the cube, 6. pole powierzchni sześcianu - volume of the cube
zadanie
Source: GroMar, licencja: CC BY 3.0.
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Interaktywna gra, polegająca na łączeniu wyrazów w pary w ciągu jednej minuty. Czas zaczyna upływać wraz z rozpoczęciem gry. Jeden ruch to odkrywanie najpierw jednej potem drugiej karty z wyrazem. Każdy wyraz jest odczytywany. Kolejny ruch to odkrywanie trzeciej i czwartej karty. W ten sposób odsłuchasz wszystkie wyrazy. Nawigacja z poziomu klawiatury za pomocą strzałek, odsłuchiwanie wyrazów enterem lub spacją. Znajdź wszystkie pary wyrazów.
Source: Zespół autorski Politechniki Łódzkiej, licencja: CC BY 3.0.

Glossary

cube
cube

sześcian

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wymowa w języku angielskim: cube
cuboid
cuboid

prostopadłościan

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wymowa w języku angielskim: cuboid
face of the cuboid
face of the cuboid

ściana boczna prostopadłościanu

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wymowa w języku angielskim: face of the cuboid
net of the cuboid
net of the cuboid

siatka prostopadłościanu

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wymowa w języku angielskim: net of the cuboid
surface area of the cube
surface area of the cube

pole powierzchni sześcianu

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wymowa w języku angielskim: surface area of the cube
surface area of the cuboid
surface area of the cuboid

pole powierzchni prostopadłościanu

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wymowa w języku angielskim: surface area of the cuboid
volume of the cube
volume of the cube

objętość sześcianu

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wymowa w języku angielskim: volume of the cube
volume of the cuboid
volume of the cuboid

objętość prostopadłościanu

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wymowa w języku angielskim: volume of the cuboid

Keywords

cubecubecube

cuboidcuboidcuboid

surface area of the cuboidsurface area of the cuboidsurface area of the cuboid - o krawędziach a, b, c: P=2ab+2ac+2bc

volume of the cubevolume of the cubevolume of the cube

volume of the cuboidvolume of the cuboidvolume of the cuboid - o krawędziach a, b, c: V=abc