Предмет: Геометрия, автор: Hterol

Решите задачу
Найти угол DBA
15 баллов

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Автор ответа: yeso4

Поскольку треугольник AKB-равнобедренный(как показанно на рисунке),то угол KAC равен углу KBC и равно 40 градусов
BD-биссиктрисса,т.к KD=DC,следовательно угол DBA=40 : 2=20 градусов

Автор ответа: Ychilkkka

AKB - равнобедренный треугольник, поэтому углы KAB=KBA=40.
KBC - равнобедренный треугольник, в котором BD - это биссектриса, она делит угол KBC пополам, поэтому угол DBC=20.
DBC это угол DBA, значит он равен 20

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Steps of the Trial
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Step 2: Opening Statements. The lawyers for each side will discuss their views of the case that you are to hear and will also present a general picture of what they intend to prove about the case. What the lawyers say in their opening statements is not evidence and, therefore, does not help prove their cases.
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