01.04.2022

Треугольник АВС имеет натуральные длины сторон и периметр 7. Определите все возможные длины сторон АВС.

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Математика

Вопрос школьника по предмету Математика

Треугольник АВС имеет натуральные длины сторон и периметр 7. Определите все возможные длины сторон АВС.

Ответ учителя по предмету Математика

Ответ:

7=1+1+5

7=1+2+4

7=1+3+3

Пошаговое объяснение:

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Контрольная работа 7 класс 1 Tom is really afraid of dogs, and every time he sees one he just …… . A freezes В embarrasses С teases 2 If I…… you, I’d cut down on all that junk food. A had been В were С would be 3 Wasn’t it very kind of Nick …… us move the furniture? A to help В help С helping 4 Sam still has some difficulty …… portraits, but he’ll improve with practice. A to paint В to painting С painting 5 This dress looks…… perfect on you; you should buy it. A very В absolutely С extremely 6 With four little children running around, it’s not always easy for Sarah to …… the house tidy. A keep В make С do 7 Don’t worry, it’s just a scratch. Clean it, put a …… on it and you’ll be fine. A cast В sling С plaster 8 Jane forgot ……. Stephen to the party, so she sent him another invitation. A inviting В invited С to invite 9 You can’t invite……. you want to the party! We can only have twenty guests. A whichever В whenever С whoever 10 By the time Linda gets here, we …… for her for more than an hour. A have been waiting В will have been waiting С are going to wait 11 Do you think that robots will ever be able to …… more complicated tasks such as driving or flying a plane? A exist В overcome С perform 12 The neglected puppies ……. from their irresponsible owner. A were removed В had removed С were removing 13 Don’t forget to call Mr Smithers when you …… to the office. A get В will get С are getting 14 Sally is …… person I’ve ever met; she hardly talks to anyone. 15 After Barney …… his chores, he had some rest. A had been doing В was doing С had done 16 If only I …… so much homework to do! I’d love to go out with my friends. A wouldn’t have В hadn’t had С didn’t have 17 Sue asked the police officer where …… her stolen car. A they had found В did they find С had they found 18 I can’t come to the cinema tonight; I…… to a fancy dress party with my brother later. A have gone В am going С go 19 They managed to catch a …… of the dolphin before it disappeared back into the water. A glimpse В sighting С look 20 That cut on your arm looks bad; you need to …… by a doctor.
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