hitunglah keliling daerah yang diasir pada gambar berikut
ulfahariyanti1018
(i) k.persegi p.= 2 (28 + 14) = 84 cm k.lingk. = \pi x d = 22/7 x 14 = 44 cm k. yang diarsir = 84 - 44 = 40 cm (ii) k. 1/4 lingk. = 1/4 x 2 x \pi x r = 1/4 x 2 x 3.14 x 10 = 1/4 x 62.8 = 15.7 cm (iii) k. persegi = 4 x s = 4 x 21 = 84 cm k. 1/2 lingk. = 1/2 x \pi x d = 1/2 x 22/7 x21 = 1/2 x 66 = 33 cm luas yg diarsir = 84 + 33 = 117 cm (iv) k.1/2 lingk = 1/2 x 2 x \pi x r = 1/2 x 2 x 3.14 x 10 = 1/2 x 62.8 = 31.4 cm
= 84 cm
k.lingk. = \pi x d
= 22/7 x 14
= 44 cm
k. yang diarsir = 84 - 44 = 40 cm
(ii) k. 1/4 lingk. = 1/4 x 2 x \pi x r
= 1/4 x 2 x 3.14 x 10
= 1/4 x 62.8
= 15.7 cm
(iii) k. persegi = 4 x s
= 4 x 21
= 84 cm
k. 1/2 lingk. = 1/2 x \pi x d
= 1/2 x 22/7 x21
= 1/2 x 66
= 33 cm
luas yg diarsir = 84 + 33 = 117 cm
(iv) k.1/2 lingk = 1/2 x 2 x \pi x r
= 1/2 x 2 x 3.14 x 10
= 1/2 x 62.8
= 31.4 cm
maaf klw salah