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maria22890
maria22890
17.03.2022 04:30 •  Геометрия

Умоляю! три кути чотирикутника,вписаного в коло взяті у порядку слідування,відносяться як 4: 8: 11.знайдіть кути чотирикутника.

👇
Ответ:
Четырехугольник можно вписать в окружность когда сумма углов противолежащих равна 180 , так как  у вас сказано что по порядку идет то 
4x+11x=180
15x=180
x=12
то есть углы противолежащие равны 48 и     132 гр
теперь другие две 
8*12+y*12=180
 8+y=15
 y=7
то есть углы равны 7*12 =84 гр     и 8*12=96 гр
ответ углы равны 48 132  84  96 гр
4,6(69 оценок)
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Ответ:
JonHenryEdem1
JonHenryEdem1
17.03.2022

You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England and you really start liking this county. Write this news to your English friend: a) The more I read about England, the bigger I like it. 6) The much I read about England, the bigger I like B) The more I read about England, the more I like it. r) The many I read about England, the many I like it. You read a lot about England an

4,4(37 оценок)
Ответ:
можской
можской
17.03.2022
Проведём двугранный угол! для этого опустим перпендикуляры из вершины и из точки А на прямую ВС! назовём точку Н!

АН - медиана!

проведём ВД и СК - медианы! они пересекаются в одной точке О и в нее же падает высота!

рассмотрим прямоугольный треугольник SOH! угол SHO =45 по условию! SO - катет=5! SH - гипотинуза и она же является апофемой!

SH=SO/sin45=5/sqrt2/2=10/sqrt2=10sqrt2/2=5sqrt2

 угол равен 45, то треугольник равнобедренный и ОН=5!

медианы точкой пересеения делятся в отношение 2 к 1! на ОН приходится только 1 часть, значит, вся меиана равна 15!

рассмотрим прямоугольный треугольник АВН! АН=15, угол ВАН=30 угол АВН =60

АВ=АН/sin60=15/sqrt3/2=30/sqrt3=30sqrt3/3=10sqrt3

Po=30sqrt3

Sb= 30sqrt3*5sqrt2/2=75sqrt6

So=10sqrt3*15/2=5sqrt3*15=75sqrt3

Sp=So+Sb=75sqrt6+75sqrt3
4,7(41 оценок)
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