Question

helpp senpaii satu soal saja ini​

Answer 1

Jawaban:

A. 10

Penjelasan dengan langkah-langkah:

∆ sama kaki dengan keliling = 51cm, sisi panjang (sisi kaki) = 2x + 4, dan sisi pendek = x - 7

Keliling ∆ sama kaki = (2 . sisi kaki) + sisi pendek

51cm = (2 . (2x + 4)) + x - 7

51cm = (4x + 8) + x - 7

51cm= 4x + x + 8 - 7

51cm = 5x + 1

50cm = 5x

x = 10cm (A)

Answer 2

K = jumlah semua sisi

51 = 2x + 4 + 2x + 4 + x - 7

51 = 5x + 1

5x = 51 - 1

5x = 50

x = 50 ÷ 5

x = 10 (Opsi A)

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