Cov txheej txheem:
Video: Ib tsob ntoo twg muaj daim duab peb sab nplooj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Deciduous ntoo nrog daim duab peb sab, elongated los yog puag ncig nplooj
- Carolina Poplar. Populus canadensis.
- Dub Poplar. Populus nigra.
- Lombardy Poplar. Populus nigra 'Italica'
- Shingle Oak. Quercus imbricaria.
- Willow Oak. Quercus phellos.
- Cork Oak. Quercus suber.
- European Chestnut. Castanea saib.
- Common Osier. Salix viminalis.
Ua li no, cov ntoo twg muaj nplooj yooj yim?
Maple, sycamore, thiab cov pos hniav qab zib yog tag nrho cov piv txwv ntawm North American ntoo nrog nplooj yooj yim qauv.
Ib yam li ntawd, tsob ntoo twg muaj 7 nplooj? Buckeye ntoo muaj ntev nplooj nrog jagged saw-toothed npoo thaum Horsechestnut ntoo muaj cov txiv ntseej ci thiab xya nplooj ntawv uas tig daj thaum lub caij nplooj zeeg.
Ib yam li ntawd ib tug yuav nug, hom ntoo twg muaj lub plawv zoo li nplooj?
Eastern redbud
tsob ntoo twg muaj tsib nplooj?
Sweetgum nplooj yog lub hnub qub-shaped nrog tsib (qee zaum xya) ntev, taw lobes uas nws cov leeg txuas mus rau lub hauv paus notched. Lawv muaj xim los ntawm ntsuab mus rau daj mus rau xim liab.
Pom zoo:
Dab tsi yog equidistant los ntawm peb sab ntawm daim duab peb sab?
Lub ntsiab lus uas sib npaug rau txhua sab ntawm daim duab peb sab yog hu ua incenter: Ib qho nruab nrab yog ib qho kab uas muaj ib qho ntawm nws qhov kawg ntawm lub vertex ntawm daim duab peb sab thiab lwm qhov kawg ntawm qhov nruab nrab ntawm sab opposite lub vertex. Peb qhov nruab nrab ntawm ib daim duab peb sab sib ntsib hauv centroid
Koj tuaj yeem ua pov thawj li cas 2 daim duab peb sab zoo sib xws siv lub kaum sab xis sab SAS zoo sib xws postulate?
SAS Similarity Theorem hais tias yog ob sab hauv ib daim duab peb sab yog proportional rau ob sab hauv lwm daim duab peb sab thiab lub kaum sab xis nyob rau hauv ob qho tib si congruent, ces ob daim duab peb sab zoo ib yam. Ib qho kev hloov pauv zoo sib xws yog ib lossis ntau qhov kev hloov pauv tsis tu ncua ua raws li kev dilation
Vim li cas nws thiaj li hais tias lub Orthocenter ntawm daim duab peb sab obtuse yuav tsum nyob rau sab nraud ntawm daim duab peb sab?
Nws hloov tawm tias tag nrho peb qhov siab ib txwm sib tshuam ntawm tib lub ntsiab lus - lub npe hu ua orthocenter ntawm daim duab peb sab. Lub orthocenter tsis yog ib txwm nyob hauv daim duab peb sab. Yog tias daim duab peb sab yog obtuse, nws yuav nyob sab nraud. Txhawm rau ua kom qhov no tshwm sim cov kab qhov siab yuav tsum tau txuas ntxiv kom lawv hla
Dab tsi yog kev sib raug zoo ntawm sab nrauv thiab sab hauv lub kaum sab xis ntawm daim duab peb sab?
Cov kaum sab hauv yog hu ua Sab hauv cov ces kaum. Cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog ib txwm 180 degrees. Lub kaum sab nrauv yog lub kaum sab xis ntawm ib sab ntawm ib qho duab, thiab ib txoj kab txuas ntxiv los ntawm sab tom ntej. Qhov sib npaug ntawm lub kaum sab nrauv thiab nws lub kaum sab hauv uas nyob ib sab kuj yog 180 degrees
Puas yog daim duab peb sab isosceles muaj ob lub kaum sab xis?
Thaum ib daim duab peb sab muaj ob sab congruent nws hu ua daim duab peb sab isosceles. Lub kaum sab xis ntawm ob sab ntawm tib qhov ntev yog congruent. Ib daim duab peb sab uas tsis muaj ib sab lossis cov kaum sab xis yog hu ua daim duab peb sab scalene