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P = 4√12 dm
P = 4√(4x3) dm
P = (4 x 2)√3
P = 8√3
L = 2√18
L = 2√(9 x 2)
L = (2 x 3)√2
L = 6√2
a) Keliling
K = 2 (p + l)
K = 2 ( 8√3 + 6√2)
K = 16√3 + 12√2 satuan dm
b) Luas
L = p x l
L = 8√3 x 6√2
L = (8 x 6)√(3 x 2)
L = 48√6 dm²
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• Kelas :
• Mapel : Matematika
• Kategori : Bangun datar
• Kata Kunci :
p = 4√12 dm
l = 2√18 dm
ditanya
keliling dan luas
penyelesian
→cari keliling
K = 2 (p + l)
K = 2 (4√12 + 2√18)
K = 2 (4√4x3 + 2√9x2)
K = 2 (4.2√3 + 2.3√2)
K = 2 (8√3 + 6√2)
K = 16√3 + 12√2
jadi kelilingnya (16√3 + 12√2) dm
→ cari luasnya
L = p x l
L = 4√12 x 2√18
L = 8√216
L = 8√36x6
L = 8.6√6
L = 48√6
jadi luasnya 48√6 dm²