Предмет: Геометрия, автор: CrazyGamerMr0705

Помогите срочно!!!!!нужно лучший ответ поставл только 3 задание

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Автор ответа: Vendety

Треугольники QPR и PTR равнобедренные, из этого следует, что
∠QPR = ∠PRQ, аналогично ∠TPR = ∠TRP
Следует, что ∠PRQ = 70°, а ∠TRP = 30°
Тогда ∠R = 70°+30° = 100°

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