Kodi kuwerengera dera rectangle ndi: malangizo

Imodzi mwa chilinganizo choyamba, amene anaphunzira masamu n'chakuti mmene kuwerengera dera rectangle lapansi. Ndi amene kaŵirikaŵiri ntchito. kali amakona anayi otizungulira, kotero nthawi zambiri zofunikira kudziwa m'dera lawo. Ngati yokhayo yodziwira kudzakhala zokwanira likupezeka mu kukhalapo kwa utoto kwa kupenta mbewu.

Zomwe dera mayunitsi pali?

Ngati ife kulankhula za munthu anatengera kwa mayiko, adzakhala mita lalikulu. Izi ndi zothandiza kuwerengetsa m'dera la pakhoma, kudenga kapena pansi. Zimasonyeza m'dera la nyumba.

Pankhani zinthu zing'onozing'ono, kulowa decimeters lalikulu, masentimita kapena millimeters. Recent zofunika, ngati chithunzi ndi zosaposa fingernail a.

Pamene kuyeza malo a mzinda kapena dziko ndi abwino kwambiri makilomita lalikulu. Koma palinso mayunitsi kuti ntchito mwachindunji kukula kwa deralo: AP ndi mahekitala. The woyamba amatchedwanso yokhotakhota.

Kodi ngati ya rectangle chiyani?

Iyi ndi njira yosavuta mmene kuwerengera dera rectangle a. Mwachidule awonjezere zedi awiri odziwika: m'litali ndi m'lifupi. chilinganizo amaoneka ngati izi: S = A * B. Apa zilembo A ndi B ali anasankha m'litali ndi m'lifupi.

Mofananamo, masamu dera lalikulu, lomwe liri vuto lapadera la rectangle a. Popeza mbali zonse ofanana, ndiye mankhwala amakhala kalata lalikulu.

Kodi ngati chithunzi zotsatirazi pa pepala Zithunzi?

Imeneyi n'kofunika kudalira chiwerengero cha maselo mkati mawonekedwe a. Chiwerengero chawo chabe kuwerengera dera rectangle a. Koma izi zikhoza kutheka ngati m'mbali mwa rectangle ndi lifanane ndi mizere cha ndende.

Nthawi zambiri ali ndi udindo wa rectangle limene mbali yake amakonda ndi kulemekeza razlinovke pepala. Kenako nambala selo zovuta kudziwa, choncho mawerengedwe ndi zovuta dera rectangle lapansi.

Choyamba muyenera kupeza malo a rectangle, amene akhoza kujambula pa foni ndendende padziko lino. Ndi yosavuta: kuchulukitsa kutalika ndipo m'lifupi. Ndiye makhalidwe chifukwa ali subtracted ku malo okwana Triangles anayi. Ndipo anayi. Mwa njira, awo masamu monga mankhwala theka la miyendo.

The chifukwa komaliza adzakupatsani mtengo wa dera rectangle lapansi.

Kodi kuchita, ngati zipani sakudziwika, koma anapatsidwa kukula kwake komanso mbali pakati diagonals chiyani?

Pamaso momwe kupeza dera rectangle ndi, imeneyi tiyenera kuwerengera dzanja lake, kuti agwiritse ntchito chilinganizo bwino. Poyamba ayenera kukumbukira chuma chake diagonals. Ndi ofanana ndi kugawana mfundo ya mphambano ziwiri. Iwo Tingaone mu kukonzedwa diagonally kugawa rectangle mu isosceles anayi Triangles kuti ndi ofanana ndi mnzake.

Ofanana mbali ya makona ya limanenedwa ngati hafu ya opendekera, amene amadziwika. Ndiko iliyonse makona ali mbali ziwiri ndi mbali pakati pa iwo omwe apatsidwa mu vuto. Mukhoza kugwiritsa ntchito Lingaliro Lovomerezeka la cosines.

Mbali imodzi ya rectangle ndi kuchita masamu malinga ndi njira imene kuzilingalira mbali wofanana makona, ndi anakonzeratu ngodya cosine. Kuwerengetsa phindu lachiwiri ndi kutenga cosine ya njingayo 180 wofanana ndi kusiyana ndi mbali kudziwika.

Tsopano vuto mmene kuwerengera dera rectangle ndi, yafupika ku chulutsa yosavuta pamagulu awiri analandira.

Kodi kuchita ngati kupatsidwa wozungulira mu vuto?

Childs, mu chikhalidwe ichi anasonyeza chiŵerengero ndipo ali m'litali ndi m'lifupi. Funso mmene kuwerengera dera rectangle, mu nkhani iyi n'kosavuta chitsanzo yowona.

Amaganiza kuti vuto ndi kukafika kutsogolo kwa rectangle 40 cm. Komanso amadziwika kuti nthawi kutalika kwa chaka chimodzi ndi hafu m'lifupi. Muyenera kudziwa malo ake.

Yothetsera vuto ikuyamba ndi kulowa wozungulira chilinganizo. utoto wake yabwino monga Uwerenge m'litali ndi m'lifupi, omwe kuchulukitsa ndi awiri payekha. Izi ndi aone kuti pali choyamba mu dongosolo limene muyenera kuzithetsa.

The chachiwiri ndi chifukwa kudziwika chikhalidwe cha makulidwe. Mbali yoyamba, i.e. kutalika, wofanana ndi mankhwala a wachiwiri (m'lifupi) Chiwerengero cha 1.5. aone kuti pali ayenera mmalo mwa chilinganizo cha wozungulira lapansi.

Iwo likukhalira kuti ndi wofanana Uwerenge monomials awiri. Origin - 2 ndi mankhwala a m'lifupi wosadziwika, wachiwiri - mankhwala a manambala 2 ndi 1.5 ndipo m'lifupi chomwecho. Mu aone kuti pali ichi, amodzi osadziwika kokha - ndi m'lifupi. M'pofunika kuwerenga, kenako ntchito aone kuti pali chachiwiri kuwerengera utali. Kokha kuchulukitsa chiwerengero awiri kuti tipeze malo a rectangle a.

Asayansi kupereka mfundo zimenezi ndi: m'lifupi - 8 masentimita, kutalika - 12 cm, ndi m'dera - 96 masentimita ^2. Otsiriza chiwerengero - yankho la vuto ili.