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Perhatikan gambar berikut ! Tentukan besar pada gambar di samping !

Perhatikan gambar berikut !
 

  
 

Tentukan besar begin mathsize 14px style angle RPQ end style pada gambar di samping !

Jawaban:

Karena begin mathsize 14px style angle PQR end style adalah sudut siku-siku yang besarnya begin mathsize 14px style 90 degree end style, maka nilai begin mathsize 14px style straight x degree end style 
 

begin mathsize 14px style table attributes columnalign right center left columnspacing 2px end attributes row cell angle PQR plus angle RPQ plus angle PRQ end cell equals cell 180 degree end cell row cell 90 degree plus 7 straight x degree plus 5 straight x degree end cell equals cell 180 degree end cell row cell 12 straight x degree end cell equals cell 180 degree minus 90 degree end cell row cell 12 straight x degree end cell equals cell 90 degree end cell row cell straight x degree end cell equals cell fraction numerator 90 degree over denominator 12 degree end fraction end cell row cell straight x degree end cell equals cell 7 comma 5 degree end cell end table end style 
 

Sehingga besar begin mathsize 14px style angle RPQ end style yaitu :


begin mathsize 14px style table attributes columnalign right center left columnspacing 2px end attributes row cell angle RPQ end cell equals cell 7 straight x degree end cell row blank equals cell 7 times 7 comma 5 degree end cell row blank equals cell 52 comma 5 degree end cell end table end style 
 

Jadi, begin mathsize 14px style angle RPQ equals 52 comma 5 degree end style 

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