Yang tau tolong di bantu ya :)

Mapel : Matematika
Materi : Bangun Datar
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Nomor 2]
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Panjang = 4cm + Lebar
Keliling = 40 cm

Ditanya Luas =__?
Jawab :
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K = 40 cm
2(p + l) = 40
(4 + l + l) = 40/2
4 + 2l = 20
2l = 20 - 4
2l = 16
l = 16/2
l = 8
Lebar = 8 cm

Panjang :
= 4 + lebar
= 4 + 8
= 12 cm

Luas
= p x l
= 12 x 8
= 96 cm²
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Nomor 3]
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K = 60 cm
Ditanya → Luas Persegi

Jawab '
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K = 60
4s = 60
s = 60/4
s = 15 cm

Jadi Luas Persegi
L = s x s
L = 15 x 15
L = 225 cm²



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Nomor 4]
Luas jajargenjang
= alas x tinggi
= 12 x 6
= 72 cm²

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Nomor 9]
d1 = 22 cm
d2 = 26 cm

Luas Belah ketupat
= ½ x d1 x d2
= ½ x 22 x 26
= ½ x 572
= 286 cm²