сбор на ъглиТЕ на триъгълник

7 клас

TCH

Задача 1.

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Задача 2.

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Задача 3.  Намерете ъглите на равнобедрен триъгълник, ако

• ъгълът при основата е равен на   а) 40º; б) 25º; в) 80º; г) 60º;

• ъгълът между бедрата е равен на а) 40º; б) 80º; в) 100º; г) 60º.

Преценете кой триъгълник да използвате за помощ или проверка.

 Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)

Ето още няколко илюстрации на теоремата за сбор на ъгли на триъгълник.

 Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)

 Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)

 Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now)