Question

Perhatikan gambar diatas, hitunglah panjang a, b, c dan d!

Tlong jwb pake cara tentang bangun dua kesebangunan yg bsa d follow!!! ​

Answer 1

Diketahui:

Segitiga 1 : Segitiga 2 : Segitiga 3

= 20 cm : (20 cm + 15 cm) : (20 cm + 15 cm + 12 cm)

= 20 cm : 35 cm : 47 cm

Ditanyakan:

a, b, c, d

Jawab:

Nilai a:

20/35 = a/(a+30)

4/7 = a/(a+30)

4(a+30) = 7a

4a + 120 = 7a

120 = 3a

40 = a

Nilai b:

20/47 = a/(a+30+b)

20/47 = 40/(40+30+b)

20/47 = 40/(70+b)

20(70+b) = 40. 47

70 + b = 2. 47

70 + b = 94

b = 24

Nilai c:

20/35 = c/60

4/7 = c/60

(4/7). 60 = c

240/7 = c

34 2/7 = c

34,2857143 = c

34,3 = c

Nilai d:

35/47 = 60/d

d = 60. (47/35)

d = 12. (47/7)

d = 564/7

d = 80 4/7

d = 80,5714..

d = 80,6

_________________________________________

DETAIL JAWABAN

Mapel: Matematika

Kelas: 9

Materi: Bab 4 - Kesebangunan dan Kekongruenan

Kata kunci: Segitiga, Sebangun

Kode Soal: 2

Kode kategorisasi: 9.2.4