Jawab:
10) 3 m x 4 m = 12 m 12 m x 25.000 = 300.000
11) K = 4s 76 = 4s [tex]\frac{76}{4} = s[/tex] s = 19 cmLuas persegi = s x s = 19 x 19 = 361 [tex]cm^{2}[/tex]
12) Luas Belah Ketupat = [tex]\frac{1}{2}[/tex] × diagonal 1 × diagonal 2 72 = [tex]\frac{1}{2}[/tex] × 12 × diagonal 2 [tex]\frac{72}{6} =[/tex] diagonal 2 12 = diagonal 2
13) Luas layang-layang = [tex]\frac{1}{2}[/tex] × diagonal 1 × diagonal 2 = [tex]\frac{1}{2}[/tex] × 20 × 30 = 300 [tex]cm^{2}[/tex]
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Jawab:
10) 3 m x 4 m = 12 m
12 m x 25.000 = 300.000
11) K = 4s
76 = 4s
[tex]\frac{76}{4} = s[/tex]
s = 19 cm
Luas persegi = s x s
= 19 x 19
= 361 [tex]cm^{2}[/tex]
12) Luas Belah Ketupat = [tex]\frac{1}{2}[/tex] × diagonal 1 × diagonal 2
72 = [tex]\frac{1}{2}[/tex] × 12 × diagonal 2
[tex]\frac{72}{6} =[/tex] diagonal 2
12 = diagonal 2
13) Luas layang-layang = [tex]\frac{1}{2}[/tex] × diagonal 1 × diagonal 2
= [tex]\frac{1}{2}[/tex] × 20 × 30
= 300 [tex]cm^{2}[/tex]