Предмет: Геометрия, автор: AnyaShuvalchuvalova

В четырехугольнике  ABCD диагонали AC и BD равны. Является ли этот четырехугольник прямоугольником?

Ответы

Автор ответа: bezimeni11
0
Да.Но он может являться также и квадратом.
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Химия, автор: ОдноклассникК
Назовите все вещества по международной номенклатуре:

1.СН =С-СН3,

2.СН=С-СН2-СН3,

3.СН3-СН2-С =С-СН3,

4.CH=C-CH(вниз CH3) -CH3
7 лет назад
Предмет: Английский язык, автор: 2911semen2006
1 Choose the correct auxiliary verb: _____ Damir live near Miras?
A) Is
B) Are
C) Do
D) Does
E) Were
2 Choose the correct verb: Every year millions of people _____ the London Museum.
A) visit
B) go
C) come
D) want
E) see
3 Solve the puzzle
Подпись отсутствует
A) family
B) enemy
C) emeny
D) anemy
E) Emily
4 Choose the correct option: My friends arrived _____ two o’clock _____ the afternoon.
A) at / in
B) in / for
C) when / ago
D) last / -
E) in / at
5 The actress _____ a bright red dress at the party yesterday.
A) was wore
B) was wearing
C) wear
D) was wear
E) is wearing
6 Choose the correct reply:
Подпись отсутствует
A) It's warm / it is raining
B) It's fine / it rains
C) It is bad / it is hot
D) It is nice / it rained
E) It's cold / it's going to
7 Put the following sentences in the correct order
Подпись отсутствует
A) 5, 1, 4, 3, 2
B) 2, 4, 1, 3, 5
C) 3, 5, 1, 2, 4
D) 2, 1, 3, 4, 5
E) 1, 2, 5, 4, 3
8 Find the synonym to the word funny
A) dull
B) boring
C) amusing
D) cruel
E) clever
9 Choose the correct number: I was born in 1996.
A) nineteen ninety-six
B) one thousand nine hundred and ninety-six
C) nineteenth ninety –six
D) ninteen ninty-six
E) nineteen ninety-sixth
10 Find the antonym to the word narrow
A) large
B) great
C) big
D) wide
E) light
11 Choose the correct form of noun: These … visited a lot of… .
A) Boys / country
B) boy / countries
C) boys/ countries
D) boys/ countrys
E) boys / countryes
12 Read the text and choose the correct option
Подпись отсутствует
A) is a flower that has been known to only a few lucky civilizations.
B) has been written about on Egyptian tombs.
C) is the first flower known to people.
D) has been treasured by all civilizations.
E) can be found in only certain areas of the world.
13. Read the text and choose the correct option
Подпись отсутствует
A) the Persians wrote about it.
B) poets have praised it.
C) the Egyptians buried them.
D) nor-them writers mention it.
E) it is referred to in the earliest forms of literature.
14. Read the text and choose the correct option
Подпись отсутствует
A) A Rose by Any Name
B) Roses and Man’s History
C) The Universal Flower
D) The Ancients and the Rose
E) Literature and Roses
15. Choose the correct word: My cat eats a _______ of tuna every day.
A) can
B) loaf
C) bottle
D) bag
E) bar
16 The opposite of rich is ______.
A) poor
B) pour
C) wealthy
D) power
E) healthy
17 One fourth of something is a ______.
A) part
B) fifteen
C) quarter
D) quoter
E) quiet
18 Choose the correct option: lf it ___ sunny we ___ for a walk.
A) was / will go
B) is / will go
C) will be / shall go
D) is / go
E) was / went
19 Choose the correct modal verb: He ___ agree with your suggestion.
A) may not
B) need
C) are able to
D) are to
E) have to
20 Choose the correct variant: ___ the weather good when you ___ tennis?
A) is / played
B) has been / will play
C) will be / played
D) is / will be playing
E) was / were playing
21 Choose the correct tense: I ___ you a letter two weeks ago.
A) had sent
B) has sent
C) sent
D) send
E) was sending
22 Choose the correct option: What ___ they ___ at the weekend?
A) were doing
B) are doing
C) have done
D) are done
E) were done
23 Choose the correct form of the verb: Tourists ___ a lot of different information when they travel.
A) get
B) gets
C) has got
D) would get
E) were getting
24 Choose the correct form of the verb: Take your raincoat or umbrella. It ___ .
A) was raining
B) rained
C) rains
D) is raining
E) would be raining
25 Choose the correct pronoun: Dinara bought ___ a new dress yesterday.
A) myself
B) itself
C) himself
D) oneself
E) herself
26 Who is officially the head of the state in Great Britain?
A) Parliament
B) Labor Party
C) Liberal Party
D) The Queen or the king
E) Conservative Party
27 Choose the correct prepositions: ___ Monday morning I had been waiting ___ you ___ two hours but you didn’t come.
A) in/for/at
B) on/-/for
C) on/for/for
D) -/with/during
E) on/for/-
28 Choose the correct option: ___ Sahara is in the northern part of Africa.
A) the
B) a
C) an
D) -
E) any
29 Choose the correct form of the verb: Anna is happy because she _____ a good job.
A) finds
B) is finding
C) founded
D) has been finding
E) has found
30 Choose the correct option: ___ best runner in the race was ___ young girl.
A) a/an
B) the/an
C) the/a
D) -/the
E) the/the​
7 лет назад
Предмет: Химия, автор: aruzansajahmet
у этого элемента 30 протонов. А) медь. Б) цинк. в) магний. Г) олово Д)свинец
Помогите пожалуйста!!!!!!!!! ​
7 лет назад
Предмет: Математика, автор: Эмили6556756

От двух пристаней удаленных друг от друга на 120 км, одновременно в противоположных направлениях отплыли катер и моторная лодка .Через 3 часа расстояние между ними было 270 км. с какой скоростью плыла лодка, если скорость катера равна 34 км в час?
11 лет назад
Предмет: Физика, автор: Сlue

Во время уборки урожая комбайнами намолоченного зерно скапливается в бункере комбайна, для разгрузки которого подходят автомашины и на ходу принимают зерно. Чтобы правильно организовать работу, нужно наметить время и пункты разгрузки зерна, подсчитать количество машин, которое потребуется для отвозки зерна от комбайнов. Время полной загрузки бункера зависит от его вместимости, от урожайности и насыпной плотности убираемой культуры (чем больше урожайность, тем меньший путь пройдёт комбайн до заполнения бункера), от скорости движения и ширины захвата жатки комбайна.

 

Вместимость бункера комбайн 3 м^3. Ширина захвата 5 м. За сколько времени заполнить бункер, если комбайн движется со скоростью 5,22 км/ч, урожайность пшеницы 3 т/га. А насыпная плотность ее 0,7 т/м^3.
11 лет назад