L segitiga = 1/2 . a. t
= 1/2 . 6 . 4
= 6 .2 = 12 cm2
L ppanjang = p. l
= 7. 20 = 140 cm2
L set.lingkaran = 1/2 . 22/7. r.r
= 1/2. 22/7. 3,5 . 3,5
= 11 . 0,5 . 3,5 = 19,25
L gabungan = 12 + 140 + 19,25 = 171,25 cm2
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L segitiga = 1/2 . a. t
= 1/2 . 6 . 4
= 6 .2 = 12 cm2
L ppanjang = p. l
= 7. 20 = 140 cm2
L set.lingkaran = 1/2 . 22/7. r.r
= 1/2. 22/7. 3,5 . 3,5
= 11 . 0,5 . 3,5 = 19,25
L gabungan = 12 + 140 + 19,25 = 171,25 cm2