No kekahi Me pono o ka isosceles triangle kiʻekiʻe

Triangle - kekahi o na kumu nui na kii ma ka anahonua. Aeia lakou e hoomakaukau i kauoha triangle mauna (kekahi nona ka huina mea like i 90 ⁰⁾ a me ka ostro- obtuse (huina waiwai emi o 90 a ^0, niioaaonoaaiii), isosceles a me equilateral. Ma ka helu i hoʻohana nāʻano likeʻole o ka walaʻauʻana geometric manaÿo a me nā loina (sine, Median kahahńnai, p ÷ haku, etc.)

Ke theme like no mākou noiʻi, e ia i ke kiekie o ka isosceles triangle. Delve i loko o ka terminology a me ka wehewehena, mākou e ole wale iki Kû ke kumu o manaÿo i e e pono e maopopo i ka pā like.

No laila, he isosceles triangle ua manaoia e lilo i kekahi triangle ma i ka waiwai o kaʻaoʻaoʻelua hoikeia ka like helu o kekahi (like ana o na mea kaua). Isosceles triangle hiki e huʻi-ka makau a me ka obtuse, a me ka pololei. Ua hiki no hoi e equilateral (nāʻaoʻao o ka huahelu e like me ka nui). Pinepine oe e lohe: a pau equilateral triangle mauna isosceles, isosceles akā, i nā mea a pau - equilateral.

Kiʻekiʻe o kekahi triangle ua noʻonoʻo i ka p ÷ haku i hāʻule, mai ka kihi ma kaʻaoʻao e ku pono ana o ka huahelu. Ua hana like me ka Media Hoʻohana e holo ana mai ke kinona o ka huina ma ka waena konu o kaʻaoʻao e ku pono.

Ke kupaianaha kiʻekiʻe o ka isosceles triangle?

• Inā ke kiʻekiʻe, kulu ma kekahiʻaoʻao, ka mea, o ka Media a me ka bisector, alaila, o ka triangle mea isosceles, noonoo iho la, a me ka hope versa: ka triangle mea isosceles ina kiʻekiʻe aʻela ia e kekahi o na aoao elua o nā bisector a me Media. Ua kapaʻia kēia kiekie o ka puke Paipala.
• Kiekie kuu iho ma kaʻaoʻao (like) aoao o ka isosceles triangle, e'ālike, a hana like huahelu elua.
• Inā 'oe i ke kiekie o ka isosceles triangle (e like me, nō, i kekahi'ē aʻe), a me kaʻaoʻao ma a keia kiekie i, ua kuu iho la, he mea hiki, e ike i ka wahi o ka iieeaii. S = 1/2 * _(c * h palena c)

Pehea e hoʻohana i ke kiekie o ka isosceles triangle i loko o ka ho? Ka waiwai ka mea e paa ana i kona kumu, e na kēia assertion kaua:

• Ke kumu o kiʻekiʻe, i nā ka Media i hookaawale ai i ke kumu i loko o nā like Hoʻohana. Ua apono mai, e ike i ka nui o ka waihona ipu wahi o ka triangle i hanaʻia ma ke kiʻekiʻe, etc.
• E like me ka p ÷ haku kiʻekiʻe o ka isosceles triangle i ke noʻonoʻo i kekahi aoao (ka uha) o ka hou akau-huina triangle. Ike i ke kumukuai o kela a me keia o na aoao elua, ma muli o ka Pythagorean theorem (ka luawai-ike no o na wawae, a me ka hypotenuse hana huinahā loina) e hoʻomaulia i ka laulā cia o ke kiʻekiʻe.

He aha ka ke kiekie o ka triangle? I mau, he isosceles triangle, a ua pono ke kiekie, aole ia i hooki i ka e no laila, i loko o lākou o Mānoa. No laila, mai lilo lākou pilina iā ia a pau nā nā papakuhikuhi ia i loko o kēia mau kii, e like me ia. He mea hiki, e hoʻomaulia i ke kiʻekiʻe o ka lōʻihi, pana pua, a ua ike hoi oia i ka lima, i ka nui o na aoao, a me kaʻaoʻao wahi, e like me kekahi mau 'ē aʻe kiko'î. Ke kiekie o ka triangle mea like me ka kekahi lākiō o kēia mau loina. E hāʻawiʻoe iāʻoe iho i ka haʻilula aʻole ole e pono e loaʻa iā lākou wale. Eia hou kekahi, me ka palena iki o ka 'ike, e hiki ke' imi i nā loina a me nā wale laila, ke hoomau aku nei, e hoʻomaulia i ka kiʻekiʻe.