Предмет: Геометрия, автор: Аноним

Помогите решить пожалуйста!!!

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Автор ответа: LFP

по равным углам при основании получаются равнобедренные треугольники -- аж три штуки)))

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LFP: на здоровье!!

LFP: какие?

LFP: (180 - 20) / 2 = 80

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