Topicm11b05f781831152c_1528449000663_0Topic

The right prisms

Levelm11b05f781831152c_1528449084556_0Level

Second

Core curriculumm11b05f781831152c_1528449076687_0Core curriculum

X. The solids. The student:

1) identifies the right prisms, the pyramids, the cylinders, the cones, the spheres in practical situations and differentiates them from other solid models;

3) identifies the nets of the right prisms and the pyramids;

5) uses given dependencies between the lengths of the edges of the prism to determine the length of the particular edges.

Timingm11b05f781831152c_1528449068082_0Timing

45 minutes

General objectivem11b05f781831152c_1528449523725_0General objective

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

Specific objectivesm11b05f781831152c_1528449552113_0Specific objectives

1. Identifying the right prisms as well as the relevant terminology in English.

2. Indicating the length of the edgeedgeedge of the prism.

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

Learning outcomesm11b05f781831152c_1528450430307_0Learning outcomes

The student:

- identifies and describes the right prisms,

- indicates the length of the edgeedgeedge of the prism.

Methodsm11b05f781831152c_1528449534267_0Methods

1. Flipped classroom.

2. Situational analysis.

Forms of workm11b05f781831152c_1528449514617_0Forms of work

1. Individual work.

2. Class work.

Lesson stages

Introductionm11b05f781831152c_1528450127855_0Introduction

The teacher repeats the definition of the right prism:

The right prismright prismright prism is a spatial figure which has:

- two bases of identical polygons,

- the lateral faces of rectangles.

The name of the prism depends on the type of the polygonal basebasebase.

Procedurem11b05f781831152c_1528446435040_0Procedure

Part 1.

The students become familiar with the properties of the cuboids, the cubes and other prisms studying the materials online on epodreczniki.pl:

http://www.epodreczniki.pl/reader/c/114190/v/21/t/student‑canon/m/i33D40GJfe

http://www.epodreczniki.pl/reader/c/114190/v/21/t/student‑canon/m/i0XLfjbaat#i0XLfjbaat_d5e78

The teacher asks the students what they learned studying the materials at home.

Task

The students work individually, using their computers. They are going to observe how the vertices, the edges and the faces of the prism change depending on the type of the polygonpolygonpolygon of the basebasebase.

They describe the prisms they will make.

[Geogebra applet]

After completing the task, the students present their observation results by answering the following questions:

How many vertices does the prism with the pentagonal base have?

How many faces does the prism with the quadrangular basebasebase have?

What figure is the base of the prism with six lateral edges?

Task

Decide if the following sentences are true or false.

a) There are more faces than vertices in the right prismright prismright prism.

b) Circles can be bases of the right prism.

c) There exists a right prism with 9 vertices.

d) There exists a right prismright prismright prism with 48 edges and 18 faces.

The student should come up with the following conclusions:

- In the right prism the number of the vertices is greater than the number of the faces but smaller than the number of edges.
- The number of vertices of the prism is always an even number.
- The number of the edges of the prism is divided by 3.
m11b05f781831152c_1527752263647_0- In the right prism the number of the vertices is greater than the number of the faces but smaller than the number of edges.
- The number of vertices of the prism is always an even number.
- The number of the edges of the prism is divided by 3.

Students discuss the topic and give the general rule:

The prism with the polygonal basebasebase with n vertices has got:
- 2n vertices;
- 3n edges including n lateral edges and 2n base edges;
- (n + 2) faces including n lateral faces and 2 bases.

Task

The sum of the lengths of all edges of the prism is 54 cm.

a) Calculate the length of the altitude of the prism, if the basebasebase is a triangle with the sides of 4 cm, 4 cm, 7 cm.

b) Calculate the length of the base edgeedgeedge of the prism, if the altitude is 6 cm and its base is a rhombus.

Part 2.

Selected students summarise the material they have learned by answering the following questions:

1) What is the difference between the cubecubecube and the cuboidcuboidcuboid?

2) What elements is the right prismright prismright prism with the hexagonal basebasebase made of?

3) What elements does the netnetnet of the triangular right prism consist of?

4) Is every cubecubecubecuboidcuboidcuboid?

5) What is the difference between the nets of the cuboid and the right prismright prismright prism with a parallelogram basebasebase?

An extra Task

Draw the netnetnet of the right prism with the altitude of 5 cm, and the bases of:

a) right triangles with the adjacent sides of 3 cm and 4 cm,

b) a rhombus with the diagonals of 8 cm and 10 cm.

Lesson summarym11b05f781831152c_1528450119332_0Lesson summary

Students do the exercises summarizing the class.

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

- The right prism is a spatial figure with two bases of identical polygons and the lateral faces of rectangles.
- The name of the prism depends on the type of its polygonal base for example the prism with the base of a pentagon is called a pentagonal prism.
m11b05f781831152c_1527712094602_0- The right prism is a spatial figure with two bases of identical polygons and the lateral faces of rectangles.
- The name of the prism depends on the type of its polygonal base for example the prism with the base of a pentagon is called a pentagonal prism.

- The prism with the polygonpolygonpolygon basebasebase with n vertices has got: 2n vertices, 3n edges, (n + 2) faces.

Selected words and expressions used in the lesson plan

basebasebase

cubecubecube

cuboidcuboidcuboid

edgeedgeedge

facefaceface

netnetnet

polygonpolygonpolygon

rectanglerectanglerectangle

right prismright prismright prism

verticalverticalvertical

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edge1
edge

krawędź

R1BWiID8jT4691
wymowa w języku angielskim: edge
right prism1
right prism

graniastosłup prosty - graniastosłup, którego ściany boczne są prostokątami

R1X9ZWdq572Wq1
wymowa w języku angielskim: right prism
base1
base

podstawa

Rva8VX6gMLYNr1
wymowa w języku angielskim: base
polygon1
polygon

wielokąt

RBtQr5Brhuaxd1
wymowa w języku angielskim: polygon
cube1
cube

sześcian – graniastosłup, którego wszystkie ściany są kwadratami

R9xrpMP2VZyLa1
wymowa w języku angielskim: cube
cuboid1
cuboid

prostopadłościan - graniastosłup, którego wszystkie ściany są prostokątami

RThCI6jH8pKrB1
wymowa w języku angielskim: cuboid
net1
net

siatka

R1bSrOnpHvLK01
wymowa w języku angielskim: net
face1
face

ściana

R1WKJXuOw7dAh1
wymowa w języku angielskim: face
rectangle1
rectangle

prostokąt

RaGgTbqArEeyH1
wymowa w języku angielskim: rectangle
vertical1
vertical

pionowy

Rx6UCzB2fd5ua1
wymowa w języku angielskim: vertical