rumus banyak sisi Limas segi-n = n + 1
sisi pada limas segienam
= 6 + 1
= 7 ✔️
________
luas permukaan balok
= 2 (pl + pt + lt)
= 2 (35. 30 + 35. 25 + 30. 25)
= 5350 cm² ✔️
_________
diagonal ruang
= √ p² + l² + t²
= √ 10² + 10² + 20²
= √ 100+100+400
= 10√6 cm ✔️ ©
panjang = 25 cm
lebar = ⁴/5 x 25 = 20 cm
tinggi = ³/5 x 25 = 15 cm
volume
= p l t
= 25. 20. 15
= 7500 cm³ ✔️
___________
v = r³ = 729
r = ³√729
r = 9 cm
luas permukaan
= 6 r²
= 6. 9²
= 486 cm² ✔️
tinggi segitiga
= √8²-4²
= 4 √3 cm
= ½ a. t. t'
= ½. 8. 4√3. 10
= 160 √3 cm³ ✔️ ©
panjang tali
= 4d + ²²/7. d
= 4. 42 + ²²/7. 42
= 168 + 132
= 300 cm ✔️
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Verified answer
nomor 14
rumus banyak sisi Limas segi-n = n + 1
sisi pada limas segienam
= 6 + 1
= 7 ✔️
________
nomor 15
luas permukaan balok
= 2 (pl + pt + lt)
= 2 (35. 30 + 35. 25 + 30. 25)
= 5350 cm² ✔️
_________
nomor 16
diagonal ruang
= √ p² + l² + t²
= √ 10² + 10² + 20²
= √ 100+100+400
= 10√6 cm ✔️ ©
_________
nomor 17
panjang = 25 cm
lebar = ⁴/5 x 25 = 20 cm
tinggi = ³/5 x 25 = 15 cm
volume
= p l t
= 25. 20. 15
= 7500 cm³ ✔️
___________
nomor 18
v = r³ = 729
r = ³√729
r = 9 cm
luas permukaan
= 6 r²
= 6. 9²
= 486 cm² ✔️
_________
nomor 19
tinggi segitiga
= √8²-4²
= 4 √3 cm
volume
= ½ a. t. t'
= ½. 8. 4√3. 10
= 160 √3 cm³ ✔️ ©
_________
nomor 20
panjang tali
= 4d + ²²/7. d
= 4. 42 + ²²/7. 42
= 168 + 132
= 300 cm ✔️
________
#semangat belajar....