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Geometric ratio

tipo de documento French-Foreign Language - Teaching sequence

Equipo Didactalia

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Geometric ratio

Worksheet overview

Description:

This unit deals with some formulae connected to Thales' theorem. Rather than giving rigorous, step-by-step demonstrations, this unit offers the advantage of verifying conclusions and properties in a straightforward manner. To conclude, different examples of similarity in triangles and polygons in general is also focused on, through an interactive approach. There is an introduction to metric relations in a right-angled triangle: the theorem of the sides adjacent to the right angle and the perpendicular height theorem.

Teaching orientation:

TYPE OF KNOWLEDGE: procedural

AIMS * Apply Thales' theorem to cases where segments are in proportion to each other. * Construct similar polygons and work out their related measurements. * Understand and know how to apply the theorem of the sides adjacent to the right angle and the perpendicular height theorem.

Previous knowledge is not necessary The contents required are explained in this course

License:

creative commons: attribution - non commercial - share alike

License description:

The use of the following contents is universal, free of charge and open, provided that it is for non-commercial educative use. The actions, products and utilities derived from its use may therefore not generate any profit. Moreover, a reference to the source is required.

End user:

Context:

schoolmate

General

Language:

english

KeyWords: ratio similarity thales theorem

Scope: universal

Structure:

linear

Agregation level:

Teaching Sequence

Collection: Descartes

Node:

INTEF

agrega.educacion.es

Repository URL: /repositorio/15052010/06/es_2010051563_9035759

IMS Manifest Download file

Technique

Format:

image/gif

text/html

Size: 120

Requirement type:

browser

Requirement name:

any

Requirement type:

operating system

Requirement name:

multi-os

Installation considerations:

Installation is not required

Other platform requirements:

Install and enable the Java interpreter and Plug-in of the Applet Descartes on local

Educational use

Educational learning resource type:

real or virtual learning environment

Interaction type:

mixed

Interaction level:

medium

Semantic density:

medium

Age: 15

Difficulty:

medium

Learning time: 2 teaching units

Educational language:

english

Cognitive process:

analyse

implement

Rights

License cost:

Access type:

universal

Access description:

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