Topicme75dbbe53676d450_1528449000663_0Topic

The volume of the cuboidvolume of the cuboidvolume of the cuboid

Levelme75dbbe53676d450_1528449084556_0Level

Second

Core curriculumme75dbbe53676d450_1528449076687_0Core curriculum

XI. Calculations in geometry. The student:

5) calculates the volumevolumevolume and the area of the cuboid knowing the lengthlengthlength of the edges;

6) uses the units of volume and capacitycapacitycapacity: millilitre, litre, cmIndeks górny 3, dmIndeks górny 3, mIndeks górny 3.

Timingme75dbbe53676d450_1528449068082_0Timing

45 minutes

General objectiveme75dbbe53676d450_1528449523725_0General objective

Matching a mathematical model to a simple situation and using it in various contexts.

Specific objectivesme75dbbe53676d450_1528449552113_0Specific objectives

1. Calculating the volumevolumevolume of the cuboid and the cubecubecube.

2. Solving the tasks in practical contexts which require calculating the volume of the cuboidvolume of the cuboidvolume of the cuboid and converting the units.

3. Communicating in English; developing mathematical and basic scientific, technical and digital competences; developing learning skills.

Learning outcomesme75dbbe53676d450_1528450430307_0Learning outcomes

The Student:

- calculates the volumevolumevolume of the cuboid and the cubecubecube knowing the lengthlengthlength of its edges,

- describes in English the tasks which are required to calculate the volume of the cuboidvolume of the cuboidvolume of the cuboid.

Methodsme75dbbe53676d450_1528449534267_0Methods

1. Practical exercises.

2. Situational analysis.

Forms of workme75dbbe53676d450_1528449514617_0Forms of work

1. Individual work.

2. Class work.

Lesson stages

Introductionme75dbbe53676d450_1528450127855_0Introduction

Revision of the definition of the cuboid and the cubecubecube and the basic units of volumevolumevolume.

The cuboid is a spatial figure whose all faces are the rectangles.

The cubecubecube is a cuboid whose all edges are equal.

The main units of volumevolumevolume are presented below:

- 1 cubic millimetre (1 mmIndeks górny 3),

- 1 cubic centimetre (1 cmIndeks górny 3),

- 1 cubic decimetre (1 dmIndeks górny 3),

- 1 cubic metre (1 mIndeks górny 3),

- 1 mmIndeks górny 3 is the volume of the cubevolume of the cubevolume of the cube with the edge of 1 mm,

- 1 cmIndeks górny 3 is the volumevolumevolume of the cube with the edge 1 cm,

- 1 dmIndeks górny 3 is the volume of the cubevolume of the cubevolume of the cube with the edge 1 dm,

- 1 mIndeks górny 3 is the volume of the cubecubecube with the edge 1 m.

The teacher introduces the topic of the lesson. The students are going to find out how to calculate the volume of the cuboidvolume of the cuboidvolume of the cuboid.

Procedureme75dbbe53676d450_1528446435040_0Procedure

The students watch the slideshow. They are supposed to notice the connection between the dimensions of the cuboid and its volumevolumevolume.

[SLIDESHOW]

Task

Watch the slideshow and notice what cuboids can be built of the identical cubes and what we can say about their volumevolumevolume.

After watching the slideshow, the students answer the following questions:

- How can you calculate the number of cubes the cuboid is made of?

- How many cubes are there in one layer?

- How many layers of cubes is the cuboid made of?

- How can we write down these calculations using only one operation?

- How would these calculation look, if the cuboid stood on other side?

The students and the teacher draw the following conclusion:
To calculate the volume of the cuboid we multiply its length, width and height.
V = a ∙ b ∙ c
me75dbbe53676d450_1527752263647_0The students and the teacher draw the following conclusion:
To calculate the volume of the cuboid we multiply its length, width and height.
V = a ∙ b ∙ c

[Illustration 1]

The volume of the figure is represented by the letter V.

Task

The cuboid presented below is constructed of cubes with the edge lengthlengthlength of of 1 cm. Calculate the volumevolumevolume of this cuboid.

[Illustration 2]

Task

Calculate the volume of the cuboidvolume of the cuboidvolume of the cuboid with the dimensions shown in the drawing.

[Illustration 3]

The cube is a cuboid whose all edges are of the same length.
Each cube is a cuboid, so we calculate its volume in the same way as the volume of the cuboid.
V = a ∙ a ∙ a
me75dbbe53676d450_1527752256679_0The cube is a cuboid whose all edges are of the same length.
Each cube is a cuboid, so we calculate its volume in the same way as the volume of the cuboid.
V = a ∙ a ∙ a

[Illustration 4]

We can write down the volume of the cubevolume of the cubevolume of the cube as the following:

V = aIndeks górny 3

Task

Calculate the volume of the cubevolume of the cubevolume of the cube with the edge of 5 cm.

An extra task:

The cuboid‑shaped carton of fruit juice has the capacitycapacitycapacity of 1 liter. What dimensions does the base have, if the heightheightheight of the carton equals 20 cm? Express the dimensions in centimetres.

Lesson summaryme75dbbe53676d450_1528450119332_0Lesson summary

Students do the exercises summarizing the class.

Then, together they sum up the classes, drawing the conclusions to memorize:

- To calculate the volume of the cuboid we multiply its length, width and height.
- The volume of the figure is represented with the letter V.
- Each cube is a cuboid, so we calculate its volume in the same way as the volume of the cuboid.
- The volume of the cube equals the cube of the length of their edges.
The students discuss what they have learned during the lesson, emphasizing the most important points. The teacher provides feedback. As an extra homework task the students can make some models of cuboids. Each of them should have the capacity of 24 cmIndeks górny 3, but the length of their edges should differ.
me75dbbe53676d450_1527712094602_0- To calculate the volume of the cuboid we multiply its length, width and height.
- The volume of the figure is represented with the letter V.
- Each cube is a cuboid, so we calculate its volume in the same way as the volume of the cuboid.
- The volume of the cube equals the cube of the length of their edges.
The students discuss what they have learned during the lesson, emphasizing the most important points. The teacher provides feedback. As an extra homework task the students can make some models of cuboids. Each of them should have the capacity of 24 cmIndeks górny 3, but the length of their edges should differ.

Selected words and expressions used in the lesson plan

capacitycapacitycapacity

cubecubecube

heightheightheight

lengthlengthlength

volumevolumevolume

volume of the cubevolume of the cubevolume of the cube

volume of the cuboidvolume of the cuboidvolume of the cuboid

widthwidthwidth

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volume of the cuboid1
volume of the cuboid

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sześcian

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volume of the cube

objętość sześcianu - iloczyn wymiarów sześcianu: długości, szerokości, wysokości

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