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Aleksandraaanovik
@Aleksandraaanovik
August 2022
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Периметр ромба равен 80, а один из углов равен 30 градусов.
Найдите площадь ромба
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Answers & Comments
MM18
Verified answer
S = a^2 * sin 30
P = 4a
a = P/4 = 80/4 = 20
S = 20*20*1/2 = 400/2 = 200
80 votes
Thanks 257
valeriiamaslova
а можно без синуса?
owlj
Verified answer
80:4=20 см одна сторона
S=a²sina
S=20²*sin30=400*1\2=200 см²
91 votes
Thanks 323
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Answers & Comments
Verified answer
S = a^2 * sin 30P = 4a
a = P/4 = 80/4 = 20
S = 20*20*1/2 = 400/2 = 200
Verified answer
80:4=20 см одна сторонаS=a²sina
S=20²*sin30=400*1\2=200 см²