Предмет: Математика, автор: elizabetsherbina

найди периметр ABCD,если ABCD -четырёхугольник AB:BC:CD:AD=3:4:7:6 ,АД на 24 см больше AB​

Ответы

Автор ответа: Alyssa08
1

Ответ:

P_{ABCD} = 160 см.

Пошаговое объяснение:

Пусть x см - часть стороны, тогда 3x см и 6x см - AB и AD соответственно.

AD > AB на 24 см, по условию.

То есть AD - AB = 24 см

6x-3x = 24

3x =24

x = 24 : 3

x = 8

8 см - часть стороны.

Тогда:

AB = 8 \cdot 3 = 24 см

BC = 8 \cdot 4 = 32 см

CD = 8 \cdot 7 = 56 см

AD = 8 \cdot 6 = 48 см

\Rightarrow P_{ABCD} = AB + BC + CD + AD = 24 + 32 + 56 + 48 = 160 см

Предыдущий вопрос
Следующий вопрос
Интересные вопросы
Предмет: Английский язык, автор: бобогдик
10 предложений на английском языке про африканских слонов
2 года назад
Предмет: Русский язык, автор: 22yura
Составьте предложения со словами смеркается, знобит, взгрустнулось
2 года назад
Предмет: Английский язык, автор: karido
Пожалуйста помогите !!! Завтра экзамен(
Нужны глаголы поставить в правильное время,в скобках оно уже указано. Надеюсь на помощь! времена обозначены - Pr I,F I, P I, P C, F P, P P,PR P и.т.д.
Пожалуйста, помогите срочнооо!! Завтра экзамен((
Нужны глаголы поставить в правильное время,в скобках оно уже указано. Надеюсь на помощь! времена обозначены - Pr I,F I, P I, P C, F P, P P,PR P и.т.д.

1) In summer our family always (to go) for rest to the Crimea. (Pr I)
2) She ( to check) your test at the moment. ( Pr C)
3) My uncle (to phone) me after he ( to return) home, tomorrow (P C)
4)Mozard (to write) more than 600 pieces of music ( P I)
5)This delegation (not to come) in 3 days because of bad weather (F I)
6)Who ( to take) my pen yesterday? (P I)
7)They (to build) many new houses in our town this year (Pr P)
8)John (to sit) in a cafe when I (to see) him last week (P C)
9)She (to publish) her new article next year ( F I)
10) My friend ( to go) to the university by the tome I (to come) ( F P , P P)
11)We never ( to hear) this story from my father (Pr P)
12)He called me up while I (to have) dinner ( P C)
13)Yesterday I ( to buy) a new watch as I (to lose) my old one ( P I, P P)
14)I'm afraid it (to rain) all day tomorrow (F C)
15)I am tired to walk home , I think I (to take) a taxi (F I)
16) Yesterday while she (to cook) the dinner, Sam (to watch) TV. (P C)
17) We (to finish) our report by 11 o'clock the day after tomorrow (F P)
18)They will go for a walk if the weather (to be) fine. (Pr I)
19)She usually (to do) her homework at home, but now she (to do) it at the library (Pr I, Pr C)
20) the Earth (to go) round the Sun (Pr I)
21)Last Saturday after our work, we (to go) to the cafe.
22)Next week my sister (to go) on a voyage across The Mediterranean Sea
23) Yesterday I (to write) my report on physics the whole evening
24) My friend (not to play) the piano, he (to play) the violin.
25) We (to do) this work next week, when we (to finish) our project (F I, Pr I)
26)You (to go) to the dentist often or seldom? (Pr I)
27)Our neighbour (to live) here for many years (Pr P C)
28) All day tomorrow I (to prepare) for the test(F C)
29) It was warm , so I (to take) off my coat (P I)
30)They ( to make) a number of important experiments in this laboratory last year (P I)
31)Why you ( to ask) him about his holidays last time? (P I)
32) She ( not to give) him her address till she ( to know) him better (F I, Pr I)
33) 5 minutes ago my little brother (to be) here and now he (to play) in the yard. (P I , Pr C)
34)It was hard carrying the bags, They (to be) very heavy (P I)
35)She ( to make) already coffee when we ( to enter) the kitchen. (P P, PI)
36) The builders (to finish) their work in time, if the weather (to be) good. (F I, Pr I)
37) They ( to correct) the dictation by the next lesson? (F P)
38) They (not to invite) her to the party yesterday ( P I)
39) Nick ( to fall) down the stairs this morning and (to break) his leg. (PI)
40) I (to translate) this text tomorrow, if you(to bring) me your new dictionary.(FI)
2 года назад
Предмет: Математика, автор: YouNics
Верно ли равенство:
а) 2/3:4/5 = 10:12
б) 3/7:4/9 = 27:28
в) 4/11:5/6 = 48:110
г) 1/2:2/3 = 4:3
8 лет назад
Предмет: Математика, автор: Janburbaeva1
89,90 Задание
Спасибо
8 лет назад