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Dalam dan , , , dan . a. Gambarlah dan kemudian tentukan besar dan !

Dalam begin mathsize 14px style triangle ABC end style dan begin mathsize 14px style triangle PQR end stylebegin mathsize 14px style straight m angle straight A equals 31 degree end stylebegin mathsize 14px style straight m angle straight B equals 112 degree end stylebegin mathsize 14px style straight m angle straight P equals 37 degree end style dan begin mathsize 14px style straight m angle straight Q equals 31 degree end style.

a. Gambarlah begin mathsize 14px style triangle ABC end style dan begin mathsize 14px style triangle PQR end style kemudian tentukan besar begin mathsize 14px style angle straight C end style dan begin mathsize 14px style angle straight R end style!

  1. begin mathsize 14px style horizontal ellipsis end style 

  2. begin mathsize 14px style horizontal ellipsis end style 

Jawaban:

Gambar begin mathsize 14px style triangle ABC end style dan begin mathsize 14px style triangle PQR end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell angle straight A plus angle straight B plus angle straight C end cell equals cell 180 degree end cell row cell angle straight C end cell equals cell 180 degree minus open parentheses angle straight A plus angle straight B close parentheses end cell row cell angle straight C end cell equals cell 180 degree minus open parentheses 31 degree plus 112 degree close parentheses end cell row cell angle straight C end cell equals cell 180 degree minus 143 degree end cell row cell angle straight C end cell equals cell 37 degree end cell end table end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell angle straight P plus angle straight Q plus angle straight R end cell equals cell 180 degree end cell row cell angle straight R end cell equals cell 180 degree minus open parentheses angle straight P plus angle straight Q close parentheses end cell row cell angle straight R end cell equals cell 180 degree minus open parentheses 37 degree plus 31 degree close parentheses end cell row cell angle straight R end cell equals cell 180 degree minus 68 degree end cell row cell angle straight R end cell equals cell 112 degree end cell row blank blank blank end table end style 

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