Engeli Obtuse: Incazelo kanye nezici

Triangle - sibalo Jomethri kokuba imigqa oxhumene amaphuzu amathathu ukuthi ungahlali ku umugqa owodwa indiza. Vertices unxantathu - iphuzu ngasesinqeni se engele, futhi emigqeni yokuxhuma kubo, ngokuthi ezinhlangothini unxantathu. Ukuze sithole indawo sibalo, bavame ukusebenzisa isikhala unxantathu ingaphakathi.

ngezigaba

Ngaphandle onxantathu kanye izinhlangothi engalingani, kukhona isosceles, okungukuthi, ukuba izinhlangothi ezimbili ezifanayo. Zibizwa ngokuthi ama-lateral, futhi omunye ohlangothini - base sibalo. Kunenye uhlobo ngemapholigoni - equilateral. Womathathu ezinhlangothini zazo anobude alinganayo.

Ukuze onxantathu esingokwemvelo degree nesilinganiso uhlelo. Lezi zibalo zingase zibe engele ezahlukene, ngakho ihlukaniswa kanje:

• Kukanxande - kokuba i-engela 90 degrees. La maqembu amabili eduze ekhoneni, ngokuthi imilenze, kanti eyesithathu - the hypotenuse;
• Cijela-nhlangothi zombili - unxantathu, kokuba zonke engele ebukhali esingeqile 90 degrees;
• Obtuse - engela omunye mkhulu kunezinhliziyo 90 degrees.

Incazelo kanye nemingcele unxantathu

Njengoba sekushiwo, izinto unxantathu - ingenye uhlobo ipholigoni kokuba vertices ezintathu kanye ngqo efanayo, bahlanganiswa. Khombisa umugqa ngokuvamile okufanayo: emagumbini - izincwadi ezincane isiLatini esesayidini ngamunye - elihambisana ngafeleba.

Uma ufaka yonke engele unxantathu, kuyoba azisizi 180 degrees. Ukuze uthole ekhoneni engaphakathi isidingo 180 degrees ukhupha ubukhulu bale engela sangaphandle unxantathu. Ukuze uthole ukuthi yini uyalingana engela okuyinto ngaphandle, kubalulekile ukuze ungeze ezimbili uwahlukanise kusuka engela ngaphakathi.

unxantathu ngamunye has it engeli oyingozi noma obtuse, malungana angela enkulu luluhlangothi enkulu. Uma uqonde phakathi vertices ziyafana, ngokulandelana, futhi engela ngayinye degrees 60.

unxantathu Obtuse

engela Obtuse unxantathu uhlale mkhulu kunezinhliziyo engela 90 degree, kodwa ezincane ukuziphilisa. Ngakho, i-engeli obtuse ivela 90 degrees kuya ku-180.

Lo mbuzo ubuzwa ukuthi kukhona angaphezu kwelilodwa engela obtuse kule sibalo? Impendulo itholakala phezu: cha, ngoba isamba engeli kufanele ibe ngaphansi ⁰ 180. Uma ama-engeli kuyoba, isibonelo, at degrees 95, eyesithathu umane akunandawo.

ipholigoni ababili obtuse yilezi:

• Uma bobabili bayalingana futhi engela side yabo elise therebetween;
• uma uhlangothi nama-engeli amabili angaphezu eduze kwayo, bayalingana;
• Uma amaqembu amathathu onxantathu obtuse bayalingana.

imigqa Emangazayo unxantathu obtuse

Zonke onxantathu kanye engele obtuse, kukhona umugqa ngokuthi emangalisayo. Eyokuqala yalezi - ukuphakama. Kuyinto perpendicular komunye vertex ohlangothini yayo ehambisana. Zonke eziphakeme babhekene endaweni, okubhekiselwa kulo ngokuthi orthocenter. Unxantathu nge engele obtuse kuyoba ngaphandle ijamo uqobo. Ngokuqondene emakhoneni ebukhali, isikhungo lapho itholakala unxantathu.

Obunye - lesemkhatsini. Lona umugqa ethathelwe ichopho ohlangothini esifanele isikhungo. Zonke uyavumelana imidiyeni ngendlela unxantathu, bese ubeka ukuqondanisa zabo - maphakathi gravity of a ipholigoni.

Bisector - umugqa bisecting kokubili engeli obtuse, nabanye. Empambana lezi obuthathu njalo kunjalo kuphela sibalo kanti kuchazwa njengokudlwengula maphakathi umbuthano alotshiwe unxantathu.

Ngakwelinye ihlangothi, maphakathi umbuthano circumscribed mayelana izibalo ingatholakala kusukela perpendiculars emithathu ephakathi. Lo mugqa, ayeshiywe aphume esebenzisa imigca lecondzile kokujoyina vertex. Indawo empambana perpendiculars ezintathu phakathi unxantathu kokuba engeli obtuse, lingaphandle sibalo.