Предмет: Геометрия, автор: uujcdrriij

Кути паралелограма відносяться як 1:2. висота, проведена з вершини тупого кута, ділить протилежну сторону на відрізки 3см і 5 см, рахуючи від вершини тупого кута. знайдіть периметр паралелограма. очень срочно пожалуйста

Ответы

Автор ответа: 2fzw5592md
1

Ответ:36 см

Объяснение: 1x + 2x = 180 (як суміжні кути). Х= 60. Тоді гострий кут паралелограма = 60, тупий = 120. Розглянемо трикутник АВО: кут ВАО= 60, ВОА= 90 (за умовою задачі), тоді кут АВО= 180-(60+90)= 30. Проти кута в 30 гр лежить катет, що дорівнює половині гіпотенузи. Отже, АВ= 5*2= 10. Петриметр = 10 +10+ 8+ 8= 36

Похожие вопросы
Предмет: Английский язык, автор: sofiykins
СРОЧНО
Exercise 11. Put the verbs in brackets into the correct tense.
Model: If the weather _____ (be) good, we often _____ (have)
lunch outside.
If the weather is good, we often have lunch outside.
1) I _____ (certainly / leave) on the next bus unless you _____ (make) a decision now. 2) If men from Mars _____ (land) on Earth, people _____ (probably / be) scared. 3) If you _____ (not / help) me immediately, I _____ (go) somewhere else. 4) I expect that most people _____ (give up) work if they _____ (have) the chance. 5) Generally speaking, if people _____ (eat) too much, they _____ (get) fat. 6) What _____ (we / do) if it _____ (rain) unexpectedly? 7) I _____ (probably / go) to the police if I _____ (lose) my wallet. 8) What _____ (you / say) if I _____ (invite) you for a week’s holiday in Hawaii? 9) If you _____ (ask) her now, she _____ (possibly / accept). 10) If you _____ (be) late, they _____ (not / allow) you to enter the room. 11) Unless you _____ (hand over) the money immediately, I _____ (shoot) you! 12) If you _____ (see) her, _____ (you / give) her my regards? 13) If you _____ (possibly / carry) these bags for me, it _____ (help) me tremendously. 14) If a bomb _____ (go off) here, the result _____ (be) terrible. 15) I _____ (not / speak) to him even if he _____ (be) the last person on earth! 16) What _____ (we / do), doctor, if he _____ (feel) any pain during the night? 17) If we _____ (live) in South America, we _____ (speak) Spanish or Portuguese! 18) I _____ (give up) smoking, if I _____ (be) you; it’s bad for you. 19) If you _____ (write) more letters, your friends _____ (reply). 20) The police will test the knife for fingerprints. If your fingerprints _____ (be) on it, you _____ (charge) with
murder.
Предмет: Українська мова, автор: na4550114
Предмет: Биология, автор: deniska21284