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Perhatikan gambar berikut! Berdasarkan gambar di atas, tentukan : a. nilai b. nilai

Perhatikan gambar berikut!



Berdasarkan gambar di atas, tentukan :

a. nilai begin mathsize 14px style x space dan space y end style

b. nilai begin mathsize 14px style 3 x and 4 y minus sign 5 x end style

Jawaban:

Jumlah dua sudut yang saling berhadapan pada segi empat tali busur adalah begin mathsize 14px style 180 degree end style, maka begin mathsize 14px style angle straight A plus angle straight C equals 180 degree end style dan begin mathsize 14px style angle straight B plus angle straight D equals 180 degree end style.

a. nilai begin mathsize 14px style straight x space dan space straight y end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell angle straight A plus angle straight C end cell equals cell 180 degree end cell row cell 2 straight x plus 3 straight x end cell equals cell 180 degree end cell row cell 5 straight x end cell equals cell 180 degree end cell row straight x equals cell 36 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 B plus angle straight D end cell equals cell 180 degree end cell row cell 110 degree plus straight y end cell equals cell 180 degree end cell row straight y equals cell 180 degree minus 110 degree end cell row blank equals cell 70 degree end cell end table end style

Jadi, nilai undefined adalah begin mathsize 14px style 36 degree space dan space 70 degree end style.

b. nilai begin mathsize 14px style 3 straight x plus 4 straight y minus 5 straight x end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 3 straight x plus 4 straight y minus 5 straight x end cell equals cell 3 open parentheses 36 degree close parentheses plus 4 open parentheses 70 degree close parentheses minus 5 open parentheses 36 degree close parentheses end cell row blank equals cell 108 degree plus 280 degree minus 180 degree end cell row blank equals cell 208 degree end cell end table end style

Jadi, nilai begin mathsize 14px style 3 straight x plus 4 straight y minus 5 straight x equals 208 degree end style.

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