Прямая mn касается окружности с центром о и радиусом r в точке n. mn=no . найдите угол mon заранее ​

mon- это прямоугольный равнобедренный треугольник, значит один из его углов равен 90°, а остальные 2 по 45°

ответ:

объяснение:

соединим м с центром окружности о.у нас образовался равнобедренный прямоугольный δonм(mn=no,угол оnм=90°,так как радиус ,проведённый к касательной в точку касания,образует с ней прямой угол).в равнобедренном прямоугольном δonм углы при основании(угол mon=угл nмо) равны и имеют меру 45°

угол mon=(180°-уг.onм): 2=(180°-90°): 2=45°

a

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b

do they have a house or a flat in minsk? does my friend have a lot of english or french books? did our family have a rest in the countryside or abroad last summer? do you usually have coffee or tea in the morning? do you have meals three or four times a day? will you have five or six lessons tomorrow?

Helen stood up from her desk and walked over to the window. She pulled the latch and pushed the window open, allowing a cool breeze to flowinto the room. "Sure, Mr Green. Is that better?" she asked.

Mr Green smiled and took a deep breath of fresh air. "Much better, thank you, Helen. It was starting to get stuffy in here," he saidinto the stuffy classroom. "There you go, Mr Green," she said as she returned to her seat.

"Thank you, Helen," Mr Green replied with a small smile. He took a deep breath of fresh air and continued with the lesson, feeling grateful for the much-needed ventilation.

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