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L setengah lingkaran=1/2 x 22/7 x 7 x 7
L setengah lingkaran = 77
L jajar genjang = 140
jadi luasnya = 77 + 140 = 217 m
Kelilingnya = K setengah lingkaran + K jajar genjang
K setengah lingkaran
= 1/2 x 2 x 22/7 x 7
= 22
K jajar genjang = 56
jadi kelilingnya = 22 + 56 = 78