Предмет: Геометрия, автор: Hhhh609

#7
α+β=405°, найдите α

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Автор ответа: Simba2017
1
α=β/2(α опирается на дугу, равное β и равен ее половине, так как вписанный)
α+β=β/2+β=405
3β=810; β=270; α=405-270=135
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