моя книга
1. Теорема о биссектрисе.
2. Steiner's Porism

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моя книга

user19693, Mar 21, 2014

1. Теорема о биссектрисе.
2. Steiner's Porism

Information

1.

Теорема о биссектрисе.

Двигая ползунок, посмотрите шаги доказательства теоремы о биссектрисе угла треугольника.

1. Чему равны углы АВD и АDВ треугольника АВD ? 2. Примените теорему Фалеса. 3. Каким оказался треугольник АВD ?

– liudmyla svirina

2.

Steiner's Porism

– Michael Borcherds

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