Video: Dab tsi yog cov qauv kev sib hloov?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txoj cai dav dav rau kev sib hloov ntawm ib qho khoom 90 degrees yog (x, y) ------ (-y, x). Rau 180 degrees, txoj cai yog (x, y) ------ (-x, -y) Rau 270 degrees, txoj cai yog (x, y) ------ (y, -x)
Ib yam li ntawd, kev sib hloov hauv cov lus yooj yim yog dab tsi?
kev sib hloov . Kev sib hloov yog tus txheej txheem los yog ua ntawm tig los yog ncig ib ncig ntawm ib yam dab tsi. Ib qho piv txwv ntawm kev sib hloov yog lub ntiaj teb orbit ncig lub hnub. Ib qho piv txwv ntawm kev sib hloov yog ib pawg neeg tuav tes hauv ib lub voj voog thiab taug kev tib yam.
Tsis tas li ntawd, qhov sib txawv ntawm kev sib hloov yog dab tsi? Muaj plaub hom kev hloov pauv geometric:
- Kev txhais lus - txav ntawm qhov khoom yam tsis tau tig nws lossis hloov nws qhov loj.
- Reflection - flipping cov khoom txog ib kab ntawm kev xav.
- Rotation - tig ib daim duab txog ib tug taw tes.
- Dilation - hloov qhov loj ntawm daim duab tsis hloov nws cov duab tseem ceeb.
Nyob rau hauv txoj kev no, dab tsi yog lub mis rau kev sib hloov?
180 degrees yog (-a, -b) thiab 360 yog (a, b). 360 degrees tsis hloov vim nws yog tag nrho kev sib hloov los yog ib lub voj voog puv. Thiab qhov no yog rau counterclockwise kev sib hloov . Yog koj xav ua clockwise kev sib hloov ua raws li cov no cov qauv : 90 = (b, -a); 180 = (-a, -b); 270 = (-b, ib); 360 = (ib, b).
Kev sib hloov hauv lej yog dab tsi?
A kev sib hloov yog ib qho kev hloov pauv uas hloov ib daim duab txog qhov chaw ruaj khov hu ua qhov chaw ntawm kev sib hloov . • Ib yam khoom thiab nws kev sib hloov yog tib cov duab thiab qhov loj me, tab sis cov duab yuav tig mus rau hauv cov lus qhia sib txawv. • Kev sib hloov yuav yog clockwise los yog counterclockwise.
Pom zoo:
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