Jawab:
1. L = 264 [tex]cm^{2}[/tex]
2. L = 87.92 [tex]cm^{2}[/tex]
Penjelasan dengan langkah-langkah:
1.
L = 2 x (pxl + pxt + lxt)
L = 2 x [(6x6) + (6*8) + (6x8)]
L = 2 x [36 +48 +48]
L = 2 x [132]
L = 264 [tex]cm^{2}[/tex]
2.
L = 2πr (r+t)
L = 2 x 3.14 x 2 x (2+5)
L = 2 x 3.14 x 2 x 7
L = 87.92 [tex]cm^{2}[/tex]
Mohon dikoreksi apabila terdapat kesalahan, terima kasih
Jawaban:
3. K lingkaran = 44 cm
L lingkaran = 154 cm²
4. (1) L balok = 264 cm²
(2) L tabung = 87,92 cm²
Penjelasan dengan langkah-langkah:
3. K lingkaran = 2πr
= 2 × 22/7 × 7
= 44 cm
L lingkaran = πr²
= 22/7 × 7 × 7
= 154 cm²
4. (1) L balok = 2(p×l) + 2(p×t) + 2(l×t)
= 2(6×6) + 2(6×8) + 2(6×8)
= 72 + 96 + 96 = 264 cm²
(2) L tabung = 2πr² + 2πrt
= 2×3,14×2×2 + 2×3,14×2×5
= 25,12 + 62,8
= 87,92 cm²
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