Nā ʻano 7 o nā huinakolu: Ka hoʻākāka ʻana e like me kā lākou ʻaoʻao a me nā ʻānela

Anter

• ʻO ke kinona geometric i hiki ke mahele ʻia e like me nā ʻano like ʻole.
• Hoʻohana o nā triangles
• Heaha ka huinakolu
• Pehea e loaʻa ai ka anapuni a me kahi o ka huinakolu
• Pehea e hoʻokaʻawale ʻia ai nā huinakolu
• Triangles e like me ka lōʻihi o ko lākou ʻaoʻao
• 1. Huinakolu kaulike
• 2. Huinakolu Scalene
• 3. Huinakolu Isosceles
• Nā huinakolu e like me ko lākou ʻaoʻao
• 4. Huinakolu kupono
• 5. loaʻa ka triangle
• 6. Triangle huehue
• 7. Huinakolu kaulike
• hopena

ʻO ke kinona geometric i hiki ke mahele ʻia e like me nā ʻano like ʻole.

I ko mākou wā kamaliʻi, ua hele mākou āpau i nā papa makemakika ma ke kula, kahi e aʻo ai mākou i nā ʻano triangles. Eia nō naʻe, i ka hala ʻana o nā makahiki, hiki iā mākou ke poina i kekahi mau mea a mākou i hoʻopaʻa ai. No kekahi kanaka he honua kupaianaha ka makemakika, akā ʻoi aku ka hauʻoli o kekahi i ka honua o nā leka.

Ma kēia ʻatikala e nānā mākou i nā ʻano triangles, no laila he mea pono e hōʻoluʻolu i kekahi mau manaʻo i hoʻopaʻa ʻia i ka wā i hala a i ʻole e aʻo i nā mea hou i ʻike ʻole ʻia.

Hoʻohana o nā triangles

I ka makemakika, hoʻopaʻa ʻia ka moleomoma, a komo i loko o nā kiʻi geometric like ʻole me nā triangles. He kūpono kēia ʻike no nā kumu he nui; ʻo kahi laʻana: e hana i nā kiʻi ʻenehana a hoʻolālā paha i kahi kahua kūkulu a me kāna kūkulu ʻana.

I kēia ʻano, a ʻokoʻa i ka huinahā hiki ke hoʻolilo ʻia i parallelogram ke hoʻohana ʻia ka ikaika i kekahi o kona mau ʻaoʻao, paʻa nā ʻaoʻao o ka triangle. Ma muli o ka paʻakikī o kona ʻano, hōʻike nā physicists hiki i ka triangle ke kū i ka nui o ka ikaika me ka ʻole deforming. No laila, hoʻohana nā mea hoʻolālā a me nā ʻenekini i nā triangles ke kūkulu ʻana i nā alahaka, nā kaupaku ma nā hale, a me nā hale ʻē aʻe. Ke kūkulu ʻia nā huinakolu i loko o nā hale, hoʻonui ke kūʻē ʻana ma ka hōʻemi ʻana i ka neʻe ʻana o ka ʻaoʻao.

Heaha ka huinakolu

ʻO ka triangle kahi polygon, kahi kiʻi geometric pālahalaha i loaʻa kahi akā ʻaʻohe ka leo. he ʻekolu ʻaoʻao o nā triangles a pau, ʻekolu pākū a ʻekolu mau ʻaoʻao i loko, a ʻo ka huina o kēia mau mea he 180º

Hana ʻia ka huinakolu o:

I kēia mau helu, ʻoi aku ka liʻiliʻi o kekahi o nā ʻaoʻao o kēia kiʻi ma mua o ka huina o nā ʻaoʻao ʻelua ʻē aʻe, a i ka huinakolu me nā ʻaoʻao like, ua like pū nā ʻaoʻao ʻaoʻao ʻē aʻe.

Pehea e loaʻa ai ka anapuni a me kahi o ka huinakolu

ʻElua mau ana a mākou e hoihoi ai e ʻike e pili ana i nā triangles ka anapuni a me ka wahi. E hoʻomaulia i ka mea mua, pono e hoʻohui i nā lōʻihi o kona mau ʻaoʻao āpau:

P = a + b + c

Akā, e ʻike he aha ka wahi o kēia kiʻi, hoʻohana ʻia kēia ʻano hana:

A = ½ (bh)

No laila, ʻo ka ʻāpana o ka huinakolu ke kumu (b) manawa ke kiʻekiʻe (h) i hoʻokaʻawale ʻia e ʻelua, a ʻo ka hopena hopena o kēia hoʻohālikelike e hōʻike ʻia i nā ʻāpana huinahā.

Pehea e hoʻokaʻawale ʻia ai nā huinakolu

Aia kekahi mau ʻano triangles, a ʻo lākou Hoʻonohonoho ʻia e noʻonoʻo ana i ka lōʻihi o ko lākou mau ʻaoʻao a me ka laulā o ko lākou mau ʻaoʻao. Ke nānā nei i kāna ʻaoʻao, aia ʻekolu mau ʻano: equilateral, isosceles a me scalene. Ma muli o kā lākou ʻaoʻao, hiki iā mākou ke hoʻokaʻawale i nā huinakolu ʻākau, obtuse, a me equiangular.

Hele mākou e kikoʻī iā lākou ma lalo.

Triangles e like me ka lōʻihi o ko lākou ʻaoʻao

Ke noʻonoʻo nei i ka lōʻihi o nā ʻaoʻao, hiki i nā triangles ke ʻano o nā ʻano.

1. Huinakolu kaulike

ʻEkolu ʻaoʻao o ka lōʻihi kaulike i ʻekolu mau kaulike kaulike, e hoʻolilo ana iā ia i hoʻokahi polygon maʻamau. ʻO nā huina i ka huinakolu like like (60º pākahi). ʻO ka ʻāpana o kēia ʻano huinakolu ke aʻa o 3 e 4 mau manawa ka lōʻihi o ka ʻaoʻao i pahu. ʻO ke anapuni ka huahana o ka lōʻihi o kekahi ʻaoʻao (l) a ʻekolu (P = 3 l)

2. Huinakolu Scalene

ʻEkolu ʻaoʻao o ka lōʻihi ʻokoʻa i ka triangle scalene, a he mau ana ʻokoʻa ko kona mau kihi. Ua like ka anapuni me ka huina o nā lōʻihi o kona ʻaoʻao ʻekolu. ʻO ia: P = a + b + c.

3. Huinakolu Isosceles

Loaʻa i nā huinakolu isosceles ʻelua mau ʻaoʻao kaulike a ʻelua mau kihi, aʻo ke ala e loaʻa ai kona anapuni ʻo: P = 2 l + b.

Nā huinakolu e like me ko lākou ʻaoʻao

Hiki ke hoʻokaʻawale ʻia nā huinakolu e like me ka laulā o kā lākou ʻaoʻao.

4. Huinakolu kupono

Hoʻohālikelike ʻia lākou i ka loaʻa ʻana o kahi ʻaoʻao kūloko pono, me ka waiwai o 90º. ʻO nā wāwae nā ʻaoʻao e hana i kēia ʻaoʻao, ʻoiai ka hypotenuse e kūlike i ka ʻaoʻao ʻaoʻao. ʻO ka ʻāpana o kēia huinakolu ka huahana o kona mau wāwae i māhele ʻia e ʻelua. ʻO ia: A = ½ (bc).

5. loaʻa ka triangle

ʻO kēia ʻano o ka huinakolu kahi kihi i ʻoi aku ma mua o 90 ° akā ma lalo o 180 °, i kapa ʻia ʻo "obtuse", a ʻelua huina huina, ma lalo o 90 °.

6. Triangle huehue

Hoʻohālikelike ʻia kēia ʻano huinakolu e kāna mau huina ʻekolu ma lalo o 90 °

7. Huinakolu kaulike

ʻO ia ka huinakolu kaulike, ʻoiai kūlike kona mau ʻaoʻao i 60 °.

hopena

Ua aʻo pono mākou āpau i ka geometry i ke kula, a kamaʻāina mākou me nā triangles. Akā i nā makahiki i hala, poina paha i ka poʻe he nui i ko lākou ʻano a pehea e hoʻokaʻawale ʻia ai. E like me kāu i ʻike ai ma kēia ʻatikala, hoʻokaʻawale ʻia nā huinakolu i nā ʻano ʻokoʻa e like me ka lōʻihi o ko lākou mau ʻaoʻao a me ka laulā o ko lākou mau huina.

ʻO Geometry kahi kumuhana i aʻo ʻia i ka makemakika, akā ʻaʻole hauʻoli nā keiki āpau i kēia kumuhana. ʻO ka ʻoiaʻiʻo, loaʻa i kekahi poʻe i nā pilikia koʻikoʻi. He aha nā kumu o kēia? I kā mākou ʻatikala "Nā pilikia a nā keiki i ke aʻo ʻana i ka makemakika" wehewehe mākou iā ʻoe iā ʻoe.