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begin mathsize 14px style K Q equals... space cm end style 

Jawaban:

Diperhatikan bahwa segitiga begin mathsize 14px style K L M end style dan begin mathsize 14px style Q L P end style sebangun. Akibatnya, perbandingan sisi-sisi yang bersesuaian sama besar, yaitu

begin mathsize 14px style fraction numerator K L over denominator Q L end fraction equals fraction numerator K M over denominator Q P end fraction equals fraction numerator M L over denominator P L end fraction end style 

sehingga

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator K L over denominator Q L end fraction end cell equals cell fraction numerator K M over denominator Q P end fraction end cell row cell fraction numerator K Q plus Q L over denominator Q L end fraction end cell equals cell fraction numerator K M over denominator Q P end fraction end cell row cell fraction numerator K Q plus 20 over denominator 20 end fraction end cell equals cell 18 over 15 end cell row cell K Q plus 20 end cell equals cell fraction numerator 18 cross times 20 over denominator 15 end fraction end cell row cell K Q plus 20 end cell equals 24 row cell K Q end cell equals 4 end table end style 

 

Jadi, diperoleh begin mathsize 14px style K Q equals 4 cm end style.

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