Aruna0001
04.06.2022 10:58

Задача 4.
В равнобедренном треугольнике ABC проведена медиана BH к основанию AC, а в треугольнике BHC — медиана HT к стороне BC. Найдите BH, если AC=24 и HT=6,5.
Задача 5.
Одна сторона AB треугольника ABC касается окружности в точке B. Другая сторона AC проходит через центр O окружности и пересекает окружность в точках D и C так, что D лежит между A и C. Найдите диаметр окружности, если AB=10 и

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Ответ:
antiangel18
28.09.2021 19:44

My family consists of four people: my lovely father, mother, elder brother and me.

My father’s name is Vladimir. He had been working as a deputy manager in the mining company, before he was pensioned off. Now he is 62 and takes care of my mother and our household. By the way, he had started cooking really great dishes after he retired, it's his favorite hobby.

My mother’s name is Olga. She is an IT manager in the treasure house. She has been working with computers for as long as I remember. I think she enjoys tinkering with them and making some changes in the software. She is 58, but still looks as if she's 48. Amazing!

My parents are kind but rather strict in educating their children and grandchildren. They always give me and my brother some good advice on how to live and share their life experience with us.

My elder brother works as a lawyer. His name is Denis. Now he lives with his own family in another country and I terribly miss our get-together time. He is quite handsome man with dark brown hair which has just started to go gray. Thank goodness, my sister-in-law is not a jealous woman. He is sincere and reliable. I can rely on him in any difficult situation. Also he is a 2–year–old girl proud father. Her name is Elizabeth, and she behaves like a real queen. She always demands attention of her parents and likes to boss around a little bit.

I can say that we’re a very amiable family. My parents understand us at first glance, and we help each other without further ado.

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Ответ:
Rapapapapap2212
10.01.2020 12:10
SO - высота пирамиды, она равна √(AS² - AO²) = √(2² - (√6*√2/2)² =
 = √(4 - (12/4)) = √1 = 1.
Отрезок ВМ = √((3√6/4)² + (√6/4)² + (1/2)²) = 2.
Применим параллельный перенос отрезка ВМ точкой В в точку А.
Получим отрезок АМ1.
Соединим точку М1 с вершиной S, отрезок SМ1 имеет точно такие же разности координат, как и отрезок ВМ, поэтому тоже равен 2.
То есть, получен равносторонний треугольник, углы в нём по 60 градусов, в том числе и искомый между AS и ВМ.

ответ: угол между прямыми AS и ВМ равен 60 градусов.
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