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luas segitiga = 1/2 x 60 x 40
luas segitiga = 1/2 x 2.400
luas segitiga = 1.200 cm^2
4. luas jajar genjang = alas x tinggi
luas jajar genjang = 10 x 8
luas jajar genjang = 80 cm^2
5. luas belah ketupat = 1/2 x d1 x d2
luas = 1/2 x 10 x 24
luas = 1/2 x 240
luas = 120 cm^2
=1/2 x 60 x 40
=1/2 x 2.400
=1.200 cm2
4.L=a x t
=10 x 8
=80 cm2
5.L=1/2 x d1 x d2
=1/2 x 5 x 12
=1/2 x 60
=30 cm2