Предмет: Математика, автор: ruslanahrytsyk18

Ребро куба дорівнює 12 дм.знайди суму довжин усіх ребер куба і площу його поверхні.

Ответы

Автор ответа: Аноним
1

у куба 12 ребер и все они равны по 12 дм. Значит, сумма всех ребер 12*12=144(дм), а площадь его поверхности состоит из 6 квадратов, поэтому пощадь его поверхности равна 6*12²=6*144=864/дм²/

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3. Yesterday I (miss) _________ my train again. I (think) _________ it (leave) _________ at 7.30. However, when I (arrive) _________ at the station at 7.25, I (learn) _________ that it (just leave) _________ I (realize) _________ later that I (use) _________ the wrong timetable.


Ex. 3 Put the verbs in the correct tense (Past Perfect Simple or Past Perfect Continuous).

A. Clair got burnt. 8. She (lie) in the sun.
B. I was surprised to meet Tom at the party. 4. I (not see) him for ages.
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H. Ann failed her exam. 6. She (not write) a single answer.
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