Предмет: Геометрия, автор: Anna050503

В треугольнике АВС на стороне АС отмечена точка D, такая, что АВ=ВD=DС. DF медиана треугольника ВDС. Найдите угол ВАС, если угол FDC равен 65°.
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Автор ответа: 333pirpir

рассмотрим треугольник BDC равнобедренный так как BD=DС
угол DВС=углу DВС и равен 65 градусов.
так как сумма углов в треугольнике 180 градусов значит
угол BDС равен 50 градусов
угол АDB + угол BDС = 180 градусов как смежные
угол АDB= 180 -50 =130

Автор ответа: 333pirpir

дальше запара

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Предмет: Английский язык, автор: 22elyorik

Read the text below and do the tasks after it.

Hurricane Katrina and New Orleans

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Выберите нужную позицию в левом поле, кликнув по ней, затем кликните в правом поле по выбранной Вами позиции (протянется линия). Если хотите изменить ответ, нажмите на точку в любом из полей (линия исчезнет).

Не забудьте проверить и сохранить свои ответы!

siding

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В треугольнике АВС на стороне АС отмечена точка D, такая, что АВ=ВD=DС. DF медиана треугольника ВDС. Найдите угол ВАС, если угол FDC равен 65°. ПОМОГИТЕ

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В треугольнике АВС на стороне АС отмечена точка D, такая, что АВ=ВD=DС. DF медиана треугольника ВDС. Найдите угол ВАС, если угол FDC равен 65°.
ПОМОГИТЕ