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lglglglgl
lglglglgl
21.07.2021 07:28 •  Геометрия

Три сторони прямокутної трапеції дорівнюють 8 см 8 см 14 см. знайдіть четверту сторону

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Ответ:
Кириииил
Кириииил
21.07.2021
Строим треуг АВС. Из точки В проводим перпендикуляр ВD. Соединяем AD и CD. Получили пирамиду, BD-перпендикуляр к основанию АВС. Грани ABD и CBD являются прямоугольными треуг-ми. У треуг. ABD и CBD катет DB-общий, катеты АВ=ВС по условию, значит треуг-ки ABD=CBD по двум катетам, тогда AD=CD, следовательно треуг. ADC равнобедренный. Найдем AD^2=АВ^2+DB^2=625+15=640DO-высота, проведенная к основанию АС, ана же и медиана и искомое расстояние от точки D до прямой АС.Так как DO медиана, то АО=48/2=24смDO=√(AD^2-AO^2)=√(640-576)=8смответ 8см
4,7(9 оценок)
Ответ:
milka294
milka294
21.07.2021

gprs is the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who

Объяснение:

gprs is the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the first of the people who are not in the

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