Yuav ua li cas koj dilate tsis nyob rau hauv lub hauv paus?
Yuav ua li cas koj dilate tsis nyob rau hauv lub hauv paus?

Video: Yuav ua li cas koj dilate tsis nyob rau hauv lub hauv paus?

Video: Yuav ua li cas koj dilate tsis nyob rau hauv lub hauv paus?
Video: Tham Kab Mob Siab A, D, E (Hepatitis A, D, E) 2024, Lub peb hlis ntuj
Anonim

A dilation tsis nyob nruab nrab ntawm lub hauv paus chiv keeb , kuj tuaj yeem xav tias yog ib qho kev txhais lus, thiab nthuav tawm raws li cov qauv. Txhais cov chaw ntawm dilation mus rau keeb kwm , siv cov dilation factor raws li qhia hauv " chaw ntawm keeb kwm " formula, ces txhais cov chaw rov qab (Undo the translation).

Ib yam li ntawd, koj ua li cas nthuav dav txog keeb kwm?

Feem ntau dilations nyob rau hauv lub coordinate dav hlau siv lub keeb kwm , (0, 0), as the center of the dilation . Pib nrog ΔABC, kos tus dilation duab ntawm daim duab peb sab nrog ib qho chaw ntawm lub keeb kwm thiab scale factor ntawm ob. Daim ntawv ceeb toom tias txhua qhov kev sib koom tes ntawm thawj daim duab peb sab tau muab faib ua qhov ntsuas qhov ntsuas (x2).

Tsis tas li ntawd, koj pom qhov ntsuas qhov ntsuas li cas? Mus nrhiav ib ntsuas qhov ntsuas nruab nrab ntawm ob daim duab zoo sib xws, nrhiav ob sab sib txuas thiab sau qhov piv ntawm ob sab. Yog tias koj pib nrog daim duab me me, koj ntsuas qhov ntsuas yuav tsawg dua ib. Yog tias koj pib nrog daim duab loj, koj ntsuas qhov ntsuas yuav loj dua ib.

Ntawm no, qhov nruab nrab ntawm lub hauv paus chiv keeb txhais li cas?

Vajvoog Centered ntawm Keeb Kwm . Txog tam sim no, koj tsuas yog siv rau lub voj voog yog los ntawm geometry. Ib lub voj voog yog cov ntsiab lus uas yog equidistant (lub vojvoog) los ntawm ib qho chaw muab (the chaw ). Hauv lub tswvyim no, peb yog mus tso lub chaw ntawm lub voj voog ntawm lub keeb kwm.

Yuav ua li cas koj dilate ib tug polygon?

Daim duab tsim los ntawm a dilation zoo ib yam li daim duab qub. Qhov ntsuas qhov ntsuas ntawm a dilation yog qhov piv ntawm cov sab lengths. Hauv chav kawm no, qhov chaw nruab nrab ntawm dilation yuav ib txwm yog lub hauv paus. Rau dilate ib polygon , muab cov kev tswj hwm ntawm txhua qhov vertex los ntawm qhov ntsuas qhov ntsuas k thiab txuas cov vertices.

Pom zoo: