Topicma0ced31fd4c00f2d_1528449000663_0Topic

Measuring and drawing angles

Levelma0ced31fd4c00f2d_1528449084556_0Level

Second

Core curriculumma0ced31fd4c00f2d_1528449076687_0Core curriculum

VIII. The angles. The student:

2) measures angles smaller than 180° with the accuracy of 1° ;

3) draws angles smaller than 180°;

5) compares angles.

Timingma0ced31fd4c00f2d_1528449068082_0Timing

45 minutes

General objectivema0ced31fd4c00f2d_1528449523725_0General objective

Matching a mathematical model to a simple situation and using it in various contexts, including a practical one.

Specific objectivesma0ced31fd4c00f2d_1528449552113_0Specific objectives

1. Measuring angles smaller than 180° with the accuracy of 1°.

2. Drawing angles smaller than 180°.

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

Learning outcomesma0ced31fd4c00f2d_1528450430307_0Learning outcomes

The student:

- measures angles smaller than 180°,

- draws angles smaller than 180°.

Methodsma0ced31fd4c00f2d_1528449534267_0Methods

1. Flipped classroom.

2. Situational analysis.

Forms of workma0ced31fd4c00f2d_1528449514617_0Forms of work

1. Individual work.

2. Class work.

Lesson stages

Introductionma0ced31fd4c00f2d_1528450127855_0Introduction

The student prepares and brings to class the drawings of:

- two acute angles,

- one right angleangleangle,

- two obtuse angles.

They will be used while completing the tasks summarising the lesson.

Students are going to work using the flipped clasroom method.

At home they become familiar with the material included in the e‑book:

http://www.epodreczniki.pl/reader/c/128788/v/19/t/student‑canon/m/iWpmAwIrWk#iWpmAwIrWk_d5e303 „Już wiesz”

http://www.epodreczniki.pl/reader/c/128788/v/19/t/student‑canon/m/iWpmAwIrWk#iWpmAwIrWk_d5e207 Przykład 3.

Procedurema0ced31fd4c00f2d_1528446435040_0Procedure

The teacher introduces the topic of the lesson: measuring and drawing angles.

Part 1ma0ced31fd4c00f2d_1527752263647_0Part 1

There are different types of the angles: acute angles, right and obtuse ones. The type of the angleangleangle depends on its measuremeasuremeasure. Measuring the angles is one of very important mathematical skills.

On the basis of the material the students have studied at home, they answer the following questions:

What is the mathematical instrument for measuring angles called?

How can it be used to measuremeasuremeasure angles?

What mistakes can be made by measuring angles?

Task

Students work individually using their computers. They are going to measuremeasuremeasure angles and compare them.

[Geogebra applet]

On the basis of the material the students have found out they answer the following questions:

How can you draw angles using the protractorprotractorprotractor?

What mistakes can be made while drawing angles ?

Task

Students draw the angles with a given measuremeasuremeasure.

Using the protractorprotractorprotractor draw the following angles:

a) 45°

b) 60°

c) 90°

d) 120°

Part 2

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

1) What is an angleangleangle and what elements does it consist of?

2) What instrument and how it can be used to measuremeasuremeasure angles?

3) How can you draw the acute angleangleangle using the protractorprotractorprotractor?

4) Why is important to identify the type of the angle before drawing it?

An extra task

Make the construction of the angles of 60° and 90° using the protractorprotractorprotractor. Find out on the Internet how to make such construction.

Lesson summaryma0ced31fd4c00f2d_1528450119332_0Lesson summary

Students do the exercises summarizing the class.

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

- We use the protractorprotractorprotractor to measuremeasuremeasure and draw angles.

- The vertex of the angle is placed in the highlighted pointpointpoint on the protractorprotractorprotractor. One armarmarm of the angleangleangle is placed on the linelineline connecting the angles of 0 and 180 degrees. The other armarmarm indicates the measuremeasuremeasure of the angleangleangle on the protractorprotractorprotractor scalescalescale.

Selected words and expressions used in the lesson plan

angleangleangle

armarmarm

degreedegreedegree

linelineline

measuremeasuremeasure

pointpointpoint

protractorprotractorprotractor

scalescalescale

vertexvertexvertex

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kąt

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miara

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kątomierz

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wymowa w języku angielskim: protractor
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punkt

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wymowa w języku angielskim: point
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arm

ramię

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wymowa w języku angielskim: arm
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prosta

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skala

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wymowa w języku angielskim: scale
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stopień

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wierzchołek

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nagranie abstraktu