Предмет: Геометрия, автор: Todorokishoto11

если в следуюших фразах имеются ошибки,найдите и исправьте их:(если что это геометрия)

1.если у прямоугольных треугольников равны гипотенузы и по одному острому углу, то эти треугольники равны,2. сумма внутренних и внешних углов треугольника равна 180°,3.внешний угол треугольника равен сумме двух внутренних углов, 4.в треугольнике против большей стороны лежит меньший угол, против большего угла лежит меньшая сторона, 5.каждая сторора треугольника меньше разности остальных сторон,7.у прямоугольного треугольника есть только одна высота,6. у прямоугольного треугольника катет равен половине гипотенузы,8. у прямоугольного треугольника высота равна половине гипотенузы,9. если у прямоугольных треугольников равны гипотенузы,то эти треугольники также равны,10.внутренний угол треугольника всегда меньше суммы двух оставшихся углов,11. внешние углы треугольника всегда тупые, плииз ответьте и 20 баллов у вас в карманах

Todorokishoto11: блин плз ответьте срочно
Todorokishoto11: 20 баллрв честно

Ответы

Автор ответа: angelina01010
33

Ответ:

1. правильно

2. только сумма внутренних углов равна 180, а внешних-360

3. правильно, двух внутренних углов, не смежных с ним

4. против большего угла лежит большая сторона, обратно, против большей стороны лежит больший угол

5. каждая сторона треугольника меньше суммы двух других сторон

6. правильно

7. если катет прямоугольного треугольника равен половине гипотенузы, то угол, лежащий против этого катета, равен 30°

8. нет

9. нет, т.к. у них равен только один угол и одна сторона, а по двум признакам невозможно доказать равенство треугольников

10. нет. Взять даже прямоугольный треугольник, в нем один из угло равен 90, как и другие два в сумме, следовательно, один угол равен двум другим, а значит, он меньше не всегда

11. не всегда. Опять таки, прямоугольный треугольник...угол, смежный с прямым также будет прямым, а не тупым

Объяснение:

liinnn488: кто ты по национальности?
Davronala: Ммм
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