2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub plaub fab uas tsim los ntawm kev koom nrog cov midpoints sib law liag ntawm ib lub plaub fab uas nws kab pheeb ces kaum yog congruent yog a rhombus.
Thaum qhov nruab nrab ntawm qhov chaw nyob ib sab ntawm plaub fab txuas nrog ntu?
Thaum cov ntsiab lus nruab nrab ntawm sab uas nyob ib sab ntawm quadrilateral txuas los ntawm ntu. Cov ntu no daim ntawv a parallelogram. Cov ntu no tsim parallelogram tsis hais txog hom plaub fab. Txij li txhua sab ntawm cov ntu no yog qhov sib txawv ntawm ib leeg.
Yuav ua li cas quadrilateral yog tsim thaum nruab nrab ntawm ib sab ntawm quadrilateral koom?
Cov plaub plaub uas tsim los ntawm kev koom nrog cov ntsiab lus nruab nrab ntawm ob sab ntawm plaub plaub fab, coj mus rau hauv kev txiav txim, yog ib qho parallelogram. (A) PQRS yog ib daim duab plaub (B) PQRS yog parallelogram (C) kab pheeb ces kaum ntawm PQRS yog perpendicular (D) kab pheeb ces kaum ntawm PQRS yog sib npaug.
Thaum lub midpoints ntawm ob sab ntawm ib quadrilateral txuas nrog lub quadrilateral tshiab yog ib qho parallelogram?
Lub midpoints ntawm ob sab ntawm ib tug arbitrary quadrilateral tsim ib tug parallelogram. Yog hais tias lub quadrilateral yog convex los yog concave (tsis complex), ces cheeb tsam ntawm lub parallelogram yog ib nrab ntawm lub quadrilateral.
Yuav ua li cas daim duab yog tsim los ntawm kev koom nrog cov midpoints ntawm cov nyob ib sab ntawm ib parallelogram?
Thiab thaum peb txuas qhov nruab nrab ntawm plaub sab rau lwm qhovgeometrical shape yuav raug tsim uas muaj tib yam khoom ntawm ib qho parallelogram vim qhov xwm txheej geometrical symmetry. Vim li no, cov duab geometrical tshiab yuav yog parallelogram.
Pom zoo:
Puas yog plaub lub plaub fab puas muaj plaub lub kaum obtuse?
A quadrilateral tsis tuaj yeem muaj plaub lub kaum obtuse. Lub kaum sab xis yog qhov ntsuas siab dua 90 degrees thiab qis dua 180 degrees. Puas yog plaub fab muaj 4 lub kaum obtuse piav? A quadrilateral tsis tuaj yeem muaj plaub lub kaum obtuse.
Qhov nruab nrab ntawm daim duab peb sab nyob qhov twg?
Lub orthocenter orthocenter 2. Yog tias daim duab peb sab yog daim duab peb sab obtuse, lub orthocenter nyob sab nraum daim duab peb sab. … Yog hais tias daim duab peb sab yog daim duab peb sab txoj cai, lub orthocenter nyob ntawm lub vertex ntawm lub kaum sab xis.
Puas yog nruab nrab phem tshaj qhov nruab nrab?
Yog li ntawd, 'mediocre' yog tsuas yog thiab tsuas yog derogatory, me ntsis hnyav dua li 'qub' thiab hais txog tib yam li 'tsis muaj dab tsi sau hauv tsev'. 'Nruab nrab' yog zoo siv nyob rau hauv nws nruj me ntsis kev paub txog zauv/statistical.
Qhov twg yog lub ntsiab lus ntawm concurrency ntawm nruab nrab ntawm daim duab peb sab?
Qhov nruab nrab yog ib txoj kab uas koom nrog qhov nruab nrab ntawm ib sab thiab rov qab vertex ntawm daim duab peb sab. Yog li ntawd, lub ntsiab lus ntawm concurrency ntawm qhov nruab nrab ntawm daim duab peb sab yog hu ua the centroid.. Qhov twg yog qhov sib txuam ntawm qhov siab ntawm daim duab peb sab?
Charlie duck nyob qhov twg ntawm qhov chaw nres tsheb hauv nruab nrab?
Ib hnub Charley tig mus rau hauv Grand Central ntawm Vanderbilt Avenue. Nws tau nqis mus rau qib thib ib. Ces nws taug kev mus rau theem thib ob. Nws yog qhov chaw ntawm qhov chaw tsheb ciav hlau hauv nroog sab laug. Charley ploj mus qhov twg?
