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2. L. persegi = 17× 17= 280 cm^2
L. segi3 = 12×17 /2 = 102 cm^2
L. gab = 280 +102 = cm^2
3. L. jajargenjang = a×t
240 = 16 ×t
t = 240/ 16= 15 cm
4. L. persegi panjang = 18×125 = 2.250 cm^2
L. belah ketupat = 18 ×25 /2 = 225 cm^2
L. gab = 2.250 - 225 =.. cm^2
5. L. persegi = 28 × 28 = 784 dm^2
L. lingkaran = 22/7 ×14×14 = 616 dm^2
L. gab = 784- 616 = dm^2
6. v. tabung = phi×r^2 ×t
v = 3,14× 20 ×20 × 50
v = 62.800.cm^3
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