Предмет: Геометрия, автор: kmiss

пожалйста помогите,а то я совсем запуталась. найдите радиус вписанной окружности в треугольнике ABC с катетами 3 и 4. сегодня надо(

Ответы

Автор ответа: momot

0

r=√(р-а)(р-в)(р-с)/р, где р=1/2(а+в+с)

с=√(а²+в²)=5

r=1

Автор ответа: vajny

0

Гипотенуза: кор(9+16)= 5.

Полупериметр: р = (3+4+5)/2=6

Площадь: S = 3*4/2 = 6

Радиус впис. окр.:

r = S/p = 6/6 = 1.

Ответ: 1.

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TERM 1 Unit 1: Legend or Truth?
Task 1:
Learners first scan and skim the text quickly and say what the text is about, who the main characters are and what the main conflict of the story is about.
Work in pairs. Read the text quickly and identify the following:
- main idea of the text
- main characters
- main conflict

The Legend of Medusa (Greek mythology)
1. Polydectes, an evil king of the island of Seriphos, fell madly in love with a beautiful woman named Danae. He wanted to marry her, but wanted nothing to do with her adult son, Perseus. Hoping to get rid of Perseus, Polydectes ruthlessly tricked the young man into brashly undertaking a deadly mission - to bring him the head of a dreaded monster called Medusa.
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3. Fortunately, the gods Athena and Hermes, as well as three nymphs, offered to help Perseus. Athena gave him a shiny bronze shield and Hermes gave him a sword that could not be
bent by the Gorgons' scales. The nymphs gave Perseus winged shoes so that he could fly, a cap that made him invisible, and a pouch in which to carry the Gorgon's head.
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While-reading: Vocabulary Extension.
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Adjectives: ___________________________________________
Verbs: ______________________________________________
Nouns: ______________________________________________
Collocations _________________________________________ [1]
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* Final victory
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Task 3 . Write an article on one of the topics:
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Descriptor
A learner
Task
- writes a thesis that describes the content;
- writes a topic sentence which grabs attention and focuses on the main idea;

− uses a variety of linking words;
- uses new vocabulary;
- uses correct spelling and grammar. [8]
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