R1SI3r42jhkfA

Geometric problems

Source: licencja: CC 0.

Zadania geometryczne

Learning objectives

  • You will communicate in English, develop mathematical, scientific, technical and IT competences, develop learning skills.

  • You will consolidate and expand knowledge of flat (2D) and spatial figures (3D).

  • You will learn methods of simple geometric calculation.

Learning effect

  • You will consolidate and expand knowledge of flat (2D) and spatial figures (3D).

  • You will perform simple geometric calculations.

Prior to the lesson, at home, review your knowledge of the flat and spatial figures.

You will find tasks from the applet useful. Your task is to complete the classification of quadrangles.

RQcSC8AtBv9jO1
Aplet geogebra. Klasyfikacja czworokątów. Poniżej znajduje się galeria będąca wersją alternatywną dla aplikacji.
Source: GroMar, licencja: CC BY 3.0.

The aim of the lesson – consolidation and expanding knowledge of flat and spatial figures.

Think- How to review information in geometrygeometrygeometry in the most effective way? Formulate the appropriate conclusions.

  • the most important geometric formulas have to be memorized,

  • it is good to learn in a group,

  • it is good to use computer self‑checking tests,

  • all the necessary information can be found in the textbooks available online.

Take part in the „mysterious password” game.

Each group receives a set of tasks to solve. Solve the tasks in writing. Each correct answer is assigned a letter or a group of letters. The letters received should be entered in the indicated blank spaces of the table. Letters form a „mysterious password”.

A table for entering letters

Table

Number of tasks

4

1

8

5

7

3

6

2

Letter

Task 1
R1DQWc0436J2K1
nagranie abstraktu

The sum of angles α and β is equal:

  1. 105Indeks górny o -TY

  2. 110Indeks górny o - AT

Ru89mblJXdrMz1
Source: GroMar, licencja: CC BY 3.0.
Task 2
R6QbI1FTYiH2n1
nagranie abstraktu

The wall has the shape of a rectangular trapezoid with a base length of 4 m and 6 m. To paint this wall, 3 paint cans were used. The paint can is enough to paint 5 mIndeks górny 2 of surface. Calculate the height of the wall.

  1. 3 m - E

  2. 4 m - P

Task 3
R44gSeVsegss51
nagranie abstraktu

How many right triangles are there in the drawing?

  1. 2 - TY

  2. 3 - A

Rl418BikG9NVA1
Source: GroMar, licencja: CC BY 3.0.
Task 4
RVJfgucunhlAG1
nagranie abstraktu

On the plan drawn on a scalescalescale of 1 : 2500, the distance from Anka's house to Danka's house is 5 cm. How many metres divides Anka's house from Danka's house?

  1. 125 m - M

  2. 1250 m - EK

Task 5
R1FI4xPrUoX381
nagranie abstraktu

The CE section has a length of 16. The CD and AB sections are equal. The length of the CD section is therefore equal:

  1. 8 - A

  2. 4 - WI

RhwhQoFZnSKKU1
Source: GroMar, licencja: CC BY 3.0.
Task 6
R1BFzsJjrHvEW1
nagranie abstraktu

The surface areasurface areasurface area of the cubecubecube is equal to 96 cmIndeks górny 2. Calculate the volumevolumevolume of this cubecubecube.

  1. 16 cmIndeks górny 3 - A

  2. 64 cmIndeks górny 3 - K

Task 7
Ratvsnz83qogN1
nagranie abstraktu

An empty vessel in the shape of a rectangular prism, similar to the one in the drawing, was filled with water to the half of the height. Calculate how many litres of water were poured into the vessel.

  1. 18 l - A

  2. 36 l - E

R1B3zRTTlWXWy1
Source: GroMar, licencja: CC BY 3.0.
Task 8
R9roiNjQ78Pxq1
nagranie abstraktu

The diamond area is 24. One of the diagonals is 8. The length of the second diagonal is:

  1. greater than 5 - M

  2. less than 5 - PR

Have you managed to read a mysterious password?

Task 9
R1Sz855JSiKnd1
nagranie abstraktu

An extra task:
In a given polygon, each angleangleangle has a measure of 1440Indeks górny °, and each side has a length of 10. Calculate the perimeterperimeterperimeter of this polygon.

Remember:

  • the most important geometric formulas have to be memorized,

  • it is good to learn in a group,

  • it is worth using computer self‑checking tests,

  • all the necessary information can be found in e‑textbooks.

Exercises

Exercise 1
R1HfE8bSw6dDt
Wersja alternatywna ćwiczenia: Select true sentences. The side walls of the cuboid are squares with a side length of 10 cm. Thus Możliwe odpowiedzi: 1. The base area of the cuboid is equal to 10000 mm2., 2. The cuboid volume is equal to 1 l., 3. The diagonal of the lateral face is less than 20 cm long., 4. The surface area of the cuboid is equal to 6 dm2.
zadanie
Source: GroMar, licencja: CC BY 3.0.
Exercise 2

Two intersecting straight lines form 4 angles, one of which has a measure of 20°. Give measures of the remaining angles.

Exercise 3

Draw two straight parallel lines, cut by the third straight line. Discuss the types of angles obtained and their properties in English.

Exercise 4
R1Z3VyvjDhbnc
Wersja alternatywna ćwiczenia: Indicate which pairs of expressions or words are translated correctly. Możliwe odpowiedzi: 1. geometria - geometry, 2. powtórzenie - revision, 3. objętość - volume, 4. pole powierzchni - surface area, 5. obwód - parallelogram, 6. prostopadłościan - perimeter
Source: GroMar, licencja: CC BY 3.0.
Rmk9MObjjbGAe1
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

angle
angle

kąt

RTBA2Llw9eHXg1
wymowa w języku angielskim: angle
cube
cube

sześcian

R9xrpMP2VZyLa1
wymowa w języku angielskim: cube
geometry
geometry

geometria

R1TONjFR7eYJF1
nagranie abstraktu
parallelogram
parallelogram

prostopadłościan

RtsjTIbcfNzhT1
wymowa w języku angielskim: parallelogram
perimeter
perimeter

obwód - suma długości wszystkich boków

R1WNHdtyZ8TkE1
wymowa w języku angielskim: perimeter
revision
revision

powtórzenie

R1BUeOzmdEo091
wymowa w języku angielskim: revision
rhombus
rhombus

romb

R11AfDG68zpm71
wymowa w języku angielskim: rhombus
scale
scale

skala

R1caoKsELzdwh1
wymowa w języku angielskim: scale
surface area
surface area

pole powierzchni

R19sih3Da6KtX1
wymowa w języku angielskim: surface area
volume
volume

objętość

R1By8kZndCUKN1
wymowa w języku angielskim: volume

Keywords

geometrygeometrygeometry

perimeterperimeterperimeter - the sum of the length of all sides

revisionrevisionrevision

surface areasurface areasurface area

volumevolumevolume