Предмет: Геометрия, автор: anamovcan39

СРОЧНО, ДАЮ 50 БАЛЛОВ!!​

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Автор ответа: natalispring1
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Так як ВД є медіаною і висотою отже, АД=ДС (так як медіана ділить протилежну сторону навпіл), ВД⊥АС ∠ВДА=∠ВДС=90°.

Розглянемо два трикутника ΔВДА та ΔВДС

ВД - спільна, АД=ДС ∠ВДА=∠ВДС=90°, отже трикутники ΔВДА та ΔВДС рівні, а отже і їх відповідні сторони рівні ⇒ АВ=ВС

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