Jawaban:
tinggi trapesium = 2 x jari-jari = 2 x 12 = 24 cm
luas trapesium =1/2 x jumlah sisi sejajar x tinggi
= 1/2 x (24+28) x 24
= 624 cm^2
luas 1/2 lingkaran = 1/2 x phi x r^2
= 1/2 x 3,14 x 12 x 12
= 226,08 cm^2
luas daerah yang diarsir = luas trapesium - luas 1/2 lingkaran
= 624 - 226,08
= 397,92 cm^2
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Jawaban:
tinggi trapesium = 2 x jari-jari = 2 x 12 = 24 cm
luas trapesium =1/2 x jumlah sisi sejajar x tinggi
= 1/2 x (24+28) x 24
= 624 cm^2
luas 1/2 lingkaran = 1/2 x phi x r^2
= 1/2 x 3,14 x 12 x 12
= 226,08 cm^2
luas daerah yang diarsir = luas trapesium - luas 1/2 lingkaran
= 624 - 226,08
= 397,92 cm^2