Penjelasan dengan langkah-langkah:
1) R = 180-(30+78) = 180-108 = 72 (B)
2) (D) a<b-c
3) D = 180-((180-135)+65) = 180-110 = 70° (C)
4) K = 14+18+26 = 58 (A)
5) LΔ = ½.a.t = ½.(8+12).10 = 100cm² (B)
6) L = ½.d1.d2
620 = ½.31.d2
d2 = (620×2)/31 = 40dm (A)
7) L = ½.d1.d2 = ½.12.18 = 108cm² (C)
8) x = √13²-12² = √169-144 = √25 = 5
y = √37²-12² = √1369-144 = √1225 = 35
d1 = 12×2 = 24cm
d2 = 5+35 = 40cm
L = ½d1.d2 = ½.24.40 = 480cm² (B)
JADIKAN JAWABAN TERCERDAS YO
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Penjelasan dengan langkah-langkah:
1) R = 180-(30+78) = 180-108 = 72 (B)
2) (D) a<b-c
3) D = 180-((180-135)+65) = 180-110 = 70° (C)
4) K = 14+18+26 = 58 (A)
5) LΔ = ½.a.t = ½.(8+12).10 = 100cm² (B)
6) L = ½.d1.d2
620 = ½.31.d2
d2 = (620×2)/31 = 40dm (A)
7) L = ½.d1.d2 = ½.12.18 = 108cm² (C)
8) x = √13²-12² = √169-144 = √25 = 5
y = √37²-12² = √1369-144 = √1225 = 35
d1 = 12×2 = 24cm
d2 = 5+35 = 40cm
L = ½d1.d2 = ½.24.40 = 480cm² (B)
JADIKAN JAWABAN TERCERDAS YO