Предмет: Математика, автор: veronikassss999

Дано трикутник ABC.AB + BC = 25 см,ВС + СА = 26 см,CA + AB = 27 см.Знайдіть периметр трикутника АВС
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Ответы

Автор ответа: tankovaka
0

Ответ:

...

Пошаговое объяснение:

Ми маємо дані про суми сторін трикутника ABC:

AB + BC = 25 см ---(1)

BC + CA = 26 см ---(2)

CA + AB = 27 см ---(3)

Ми можемо скласти систему рівнянь, використовуючи ці рівності і позначивши довжини сторін як a, b та c:

a + b = 25 ---(1)

b + c = 26 ---(2)

c + a = 27 ---(3)

Ми можемо розв'язати цю систему, щоб отримати значення довжин сторін:

a = 14, b = 11, c = 12

Отже, периметр трикутника ABC дорівнює:

a + b + c = 14 + 11 + 12 = 37

Таким чином, периметр трикутника ABC дорівнює 37 см

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1. Mark has got a new flat. His/Our flat is spacious.
2. This camera isn’t mine/my.
3. Tina and Susan are her/hers friends.
4. Tim usually … breakfast.
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5. Mary … Cola yesterday.
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My name is John and I’m eleven years old. My best friend is Stan and he's thirteen years old. Stan is very smart and can do a lot of things. Stan can play the drums and the electric guitar. He is very good at sports. He can play football very well and he can swim. I can't play football very well and I can't swim. Stan cooks lunch for himself and his little brother every day. I can't cook because my mum says I'm too young. There is one thing that Stan and I can't do. We can't drive a car!
e.g. Who is eleven years old, Stan or John? – John.
1) How old is John’s best friend? ____________
2) What can Stan play? ___________
3) What sport can’t John do? _____________
4) Who cooks lunch every day? ______________
5) What can’t Stan and John do? ____________