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luas lingkaran
Πr'2
22/7 . 14 . 14
616 cm'2
luas juring/luas lingkaran= 90°/360°(90 krn itu siku2)
L.juring/616= 90/360
L.juring=90 . 616/360
L.juring= 154 cm'2
Luas segitiga
14 .14/2
98 cm'2
Luas tembereng( stengahnya daun)
154-98
56 cm'2
Luas daun
56+56
112 cm'2
semoga membantu dan benar