Video: Yuav ua li cas koj tsim ib dilation nrog ib tug scale factor ntawm 2?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tsim kom muaj kev loj hlob nrog a ntsuas qhov ntsuas ntawm '' 2 '': Kos cov kab ncaj nraim txuas txhua qhov vertex mus rau qhov chaw ntawm dilation . Siv lub compass los nrhiav cov ntsiab lus uas yog ob npaug ntawm qhov kev ncua deb ntawm qhov chaw dilation raws li tus thawj vertices. Txuas cov vertices tshiab los tsim cov dilated duab.
Ib yam li ntawd, nws raug nug, ua li cas koj dilate los ntawm qhov ntsuas ntawm 2?
Dilation nrog scale factor 2 , multiply 2 . Pib nrog quadrilateral ABCD (xiav), kos lub dilation daim duab ntawm lub quadrilateral nrog ib qhov chaw ntawm lub hauv paus chiv keeb thiab a ntsuas qhov ntsuas ntawm ½. Txhua qhov vertex ntawm ABCD yog muab faib ua ½. Dilation nrog ntsuas qhov ntsuas ½, muab faib ua ½.
Tsis tas li ntawd, txoj cai ntawm dilation yog dab tsi? Ib qho cim txoj cai muaj daim ntawv nram qab no Dk(x, y) = (kx, ky) thiab qhia koj tias qhov preimage tau undergone a. dilation hais txog keeb kwm los ntawm scale factor k. Yog tias k ntau dua ib qho, lub dilation duab yuav loj dua lub. ua ntej. Yog tias k nyob nruab nrab ntawm 0 thiab 1, lub dilation duab yuav me dua qhov preimage.
Ib yam li ntawd, nws raug nug, dab tsi yog dilated los ntawm qhov ntsuas qhov ntsuas ntawm 2 txhais tau li cas?
Piv txwv 1. Daim duab hauv qab no qhia a dilation nrog a scale factor ntawm 2 . Qhov no txhais tau tias tias daim duab, A', yog ob zaug loj dua li daim duab ua ntej A. Zoo li lwm yam kev hloov pauv, cov cim tseem ceeb yog siv los qhia qhov txawv ntawm daim duab ua ntej. Daim duab ib txwm muaj qhov tseem ceeb tom qab tsab ntawv xws li A'.
Qhov ntsuas qhov ntsuas ntawm 12 yog dab tsi?
Ua piv txwv, xav txog ob lub squares uas zoo sib xws. Ib tug muaj ib sab ntev ntawm 2 ntiv tes thiab lwm tus muaj ib sab ntev ntawm 4 ntiv tes. Qhov no muab ib scale factor ntawm 1:2 los ntawm lub me square mus rau lub loj square. Ob qhov zoo sib xws squares muaj a scale factor ntawm 1:2 los ntawm lub me square mus rau lub loj square.
Pom zoo:
Yuav ua li cas koj qhia yog hais tias ib tug transformation yog ib tug dilation?
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