afrijalromiazi
A. K lingkaran + sisi P. panjang= pi x d + 2s = 3,14 x 20 + (2x (50-20)) = 62,8 + 60 =122,8 B. 1/2 (pi x d)= 1/2(3,14 x 18) = 1/2(56,52) = 28,26
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jlsp2919
A) Kll p. panjang = 2(p+l) = 2 (50+20) = 140 Kll lingkaran = π x d =314/100 x 20 = 62,8
= 3,14 x 20 + (2x (50-20))
= 62,8 + 60 =122,8
B. 1/2 (pi x d)= 1/2(3,14 x 18)
= 1/2(56,52)
= 28,26
Kll p. panjang = 2(p+l)
= 2 (50+20)
= 140
Kll lingkaran = π x d
=314/100 x 20
= 62,8
Kll daerah yg diarsir =
Kll p.panjang- kll lingk.
= 140-62,8
= 77,2