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Describe the transformation that maps the triangle ABC onto the triangle with vertices D, E, F.

Mathematics

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Answer

Mzunguko wa digrii 90 kisaa kuzunguka asili (0, 0)\text{Mzunguko wa digrii 90 kisaa kuzunguka asili (0, 0)}

Step-by-step solution

3 steps
  1. Tambua kuratibu za vipeo vya umbo asili (object) na umbo lililobadilishwa (image).

    Kutoka kwenye grafu, tunapata kuratibu zifuatazo:
    Vipeo vya umbo asili (ABC):

    A=(−2,4)A = (-2, 4) B=(−1,2)B = (-1, 2) C=(−3,1)C = (-3, 1)

    Vipeo vya umbo lililobadilishwa (A'B'C'):

    A′=(4,2)A' = (4, 2) B′=(2,1)B' = (2, 1) C′=(1,3)C' = (1, 3)
  2. Linganisha kuratibu ili kubaini aina ya mabadiliko.

    Tuchunguze uhusiano kati ya kuratibu za kila ncha:
    Kwa ncha A: (−2,4)(-2, 4) imebadilika kuwa (4,2)(4, 2).
    Kwa ncha B: (−1,2)(-1, 2) imebadilika kuwa (2,1)(2, 1).
    Kwa ncha C: (−3,1)(-3, 1) imebadilika kuwa (1,3)(1, 3).

    Tunaona kwamba kwa kila ncha (x,y)(x, y) ya umbo asili, ncha inayolingana (x′,y′)(x', y') ya umbo lililobadilishwa inafuata sheria (x′,y′)=(y,−x)(x', y') = (y, -x).
    Hii inamaanisha kuwa thamani ya xx mpya ni thamani ya yy ya zamani, na thamani ya yy mpya ni thamani ya −x-x ya zamani.

  3. Eleza mabadiliko.

    Sheria ya mabadiliko (x,y)→(y,−x)(x, y) \to (y, -x) inawakilisha mzunguko wa digrii 90 kisaa (clockwise) kuzunguka asili (origin) (0,0)(0, 0).

    Mabadiliko yanayoelezea ramani ya umbo kutoka ABC hadi A'B'C' ni:

    Mzunguko wa digrii 90 kisaa kuzunguka asili (0, 0)\text{Mzunguko wa digrii 90 kisaa kuzunguka asili (0, 0)}
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