Question

tolong donk kk/siapun yang bisa jawab sampai besok malam masih bisa kok tolong banget jgn ngasal ya plis (no 2,4 aj) jgn iseng donk ​

Answer 1

Jawaban:

2a. x= 5.

b. y= 15

4.a. x = 30

b. <DCE = 120°

<BCE = 25°

Penjelasan dengan langkah-langkah:

2.

[tex] \frac{ps}{st} = \frac{pr}{qr} \\ \frac{4}{x} = \frac{16}{20} \\ x = \frac{80}{16} = 5[/tex]

[tex] \frac{pt}{x} = \frac{pq}{qr} \\ \frac{3}{5} = \frac{3 + y}{20} \\ 15 + 5y = 60 \\ y = 15[/tex]

4.

[tex] <acd + < dce + < bce = 180 \\ (x + 15) + (3x + 20) + (x - 5) = 180 \\ 5x + 30= 180 \\ 5x = 150 \\ x = 30[/tex]

<DCE = 3x + 20

= 3(30) + 30

= 120

<BCE = x - 5

= 30 - 5 = 25