Предмет: Геометрия, автор: maksifive

3. Стороны треугольника равны a, b, c. Является ли этот треугольник прямоугольным, если a=9, b=12, c = 8. Ответ обоснуйте.

4. ∆АВС, CD ┴ АВ, АС=20см, ВС=15 см, СD = 12 см. Вычислите периметры треугольников АDС и ВDС

areviksanamyan: какой D ? это треугольник квадрат или что ?

Ответы

Автор ответа: areviksanamyan

Ответ:

3,- нет

Объяснение:

3. воспользуемся теоремой Пифагора если 144=81+64 то это прямоугольный... это не так 144-81=63 а это не квадрат 8

maksifive: а знаешь что в 4?

areviksanamyan: не понимаю вопрос какой D если в вопросе треугольник?

maksifive: там не Д это типо значок треугольникп

maksifive: а может это средняя линия.

areviksanamyan: не знаю если честно сори вопрос немного некорректный

maksifive: ну лан, спс помог

maksifive: стой, я понял

maksifive: там типо два треугольника объединенные одной гипотенузой\

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