Jawab:
19.b.1470cm^{2}
Penjelasan dengan langkah-langkah:
LUAS BANGUN DATAR =LUAS SEGITIGA BCD +LUAS ABDE
BD^{2}=
BD^{2}=\sqrt{ 25^{2}-15^{2} =400}
BD=20
LUAS SEGITIGA BCD=1/2.a.t=1/2.15.20=1/2.300=150cm^{2}
LUAS ABDE=16.20=320cm^{2}
LUAS BANGUN DATAR=320cm^{2}+150cm^{2}=470cm^{2}
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Jawab:
19.b.1470cm^{2}
Penjelasan dengan langkah-langkah:
LUAS BANGUN DATAR =LUAS SEGITIGA BCD +LUAS ABDE
BD^{2}=
BD^{2}=\sqrt{ 25^{2}-15^{2} =400}
BD=20
LUAS SEGITIGA BCD=1/2.a.t=1/2.15.20=1/2.300=150cm^{2}
LUAS ABDE=16.20=320cm^{2}
LUAS BANGUN DATAR=320cm^{2}+150cm^{2}=470cm^{2}