November 2019 1 11 Report
4. Pada belah ketupat ABCD di
bawah ini, <A = 60° dan BD = 12 cm. Luas belah ketupat ABCD adalah ....

a. \: \: 36 \sqrt{2} \: \: {cm}^{2}
b. \: \: 36 \sqrt{3} \: \: {cm}^{2}
c. \: \: 72\sqrt{2} \: \: {cm}^{2}
d. \: \: 72 \sqrt{3} \: \: {cm}^{2}


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