АВС үшбұрышында АВ қабырғасы Ас қабырғасынан үш ес В және С төбелерінен жүргізілген биіктіктерінің кат табыңдар. ррасынан үш есе ұзын, тіктерінің қатынасын дасқасы ж оқпа
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the only thing I have to go back in a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great day at the only one who are not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great day at the only one who are not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is not a great time to get a great time to get a great time to get a good idea that is
Номер 1
ОА радиус,он является перпендикуляром к касательной СК,поэтому
<ОАС=90 градусов
<ВАО=90-30=60 градусов
Треугольник ВАО равнобедренный,т к
АО=ОВ,как радиусы,углы при основании равнобедренного треугольника равны между собой
<ВАО=<ОВА=60 градусов
<ВОА=180-60•2=60 градусов
Номер 2
<МОК=120 градусов,т к он опирается на дугу 120 градусов и является центральным углом
Номер 3
Соединим точки В и С с центром окружности с точкой О ,и рассмотрим треугольник ВОС
Это равнобедренный треугольник,т к ОС=ОВ,как радиусы,тогда углы при основании равнобедренного треугольника равны между собой
<ВСО=<СВО
ОМ является в равнобедренном треугольнике и биссектрисой и высотой и медианой и делит хорду ВС на две равные части
СМ=СВ
Если диаметр или радиус делит хорду пополам,то он перпендикулярен к хорде
Объяснение: