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Sebuah segitiga  dengan  dicerminkan terhadap gari...

Sebuah segitiga begin mathsize 14px style A B C end style dengan begin mathsize 14px style A open parentheses 2 comma 1 close parentheses comma B open parentheses 5 comma 2 close parentheses comma C open parentheses 3 comma 5 close parentheses end style dicerminkan terhadap garis begin mathsize 14px style y equals negative x end style, koordinat bayangan begin mathsize 14px style A B C end style adalah ...

  1. begin mathsize 14px style A apostrophe open parentheses negative 1 comma negative 2 close parentheses comma space B apostrophe open parentheses negative 2 comma negative 5 close parentheses comma C apostrophe open parentheses negative 5 comma negative 3 close parentheses end style 

  2. begin mathsize 14px style A apostrophe left parenthesis negative 1 comma 2 right parenthesis comma space B apostrophe left parenthesis 2 comma negative 5 right parenthesis comma C apostrophe left parenthesis negative 5 comma negative 3 right parenthesis end style 

  3. begin mathsize 14px style A apostrophe left parenthesis negative 2 comma 1 right parenthesis comma space B apostrophe left parenthesis 5 comma 2 right parenthesis comma C apostrophe left parenthesis negative 5 comma negative 3 right parenthesis end style 

  4. begin mathsize 14px style A apostrophe left parenthesis negative 1 comma negative 2 right parenthesis comma space B apostrophe left parenthesis negative 2 comma negative 5 right parenthesis comma C apostrophe left parenthesis 5 comma 3 right parenthesis end style 

  5. begin mathsize 14px style A apostrophe left parenthesis 1 comma 2 right parenthesis comma space B apostrophe left parenthesis 2 comma 5 right parenthesis comma C apostrophe left parenthesis 5 comma 3 right parenthesis end style 

Jawaban:

Refleksi transformasi geometri dapat dikatakan pencerminan.

Diketahui segitiga begin mathsize 14px style A B C end style dengan titik begin mathsize 14px style A open parentheses 2 comma 1 close parentheses comma B open parentheses 5 comma 2 close parentheses comma C open parentheses 3 comma 5 close parentheses end style.

Refleksi terhadap garis begin mathsize 14px style y equals negative x end style

begin mathsize 14px style P left parenthesis x comma y right parenthesis rightwards arrow with Garis space y equals negative x on top P apostrophe left parenthesis negative y comma negative x right parenthesis A left parenthesis 2 comma 1 right parenthesis rightwards arrow with Garis space y equals negative x on top A apostrophe left parenthesis negative 1 comma negative 2 right parenthesis B left parenthesis 5 comma 2 right parenthesis rightwards arrow with Garis space y equals negative x on top B apostrophe left parenthesis negative 2 comma negative 5 right parenthesis C left parenthesis 3 comma 5 right parenthesis rightwards arrow with Garis space y equals negative x on top C apostrophe left parenthesis negative 5 comma negative 3 right parenthesis end style    

Sehingga, koordinat bayangan begin mathsize 14px style A B C end style adalah begin mathsize 14px style A apostrophe open parentheses negative 1 comma negative 2 close parentheses comma space B apostrophe open parentheses negative 2 comma negative 5 close parentheses comma C apostrophe open parentheses negative 5 comma negative 3 close parentheses end style.

Jadi, jawaban yang tepat adalah A.

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