a. keliling setengah lingkaran = πd ÷ 2
= × 7 ÷ 2
= 11 cm
b. kel. stngh ling. = πd ÷ 2
= × 14 ÷ 2
= 22 cm
d. kel. persegi panjang = 2 × ( p + l ) = 2 × 17 = 34 cm
kel ling = πd = × 7 = 22 cm
keliling bangunan diarsir = 34 - 22 = 12 cm
h. kel persegi = 21 × 4 = 84 cm
kel ling. 1 = πd ÷ 2 = × 14 ÷ 2 = 22 cm
kel ling. 2= πd ÷ 2 = × 28 ÷ 2 = 44 cm
keliling bangunan diarsir = 84 - (22 + 44) = 18 cm
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10b) K = 22/7 x 14 = 44cm
10d) K = 2(10+7) - 22/7 x 7 =
K = 34 - 22 = 12cm
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a. keliling setengah lingkaran = πd ÷ 2
= × 7 ÷ 2
= 11 cm
b. kel. stngh ling. = πd ÷ 2
= × 14 ÷ 2
= 22 cm
d. kel. persegi panjang = 2 × ( p + l ) = 2 × 17 = 34 cm
kel ling = πd = × 7 = 22 cm
keliling bangunan diarsir = 34 - 22 = 12 cm
h. kel persegi = 21 × 4 = 84 cm
kel ling. 1 = πd ÷ 2 = × 14 ÷ 2 = 22 cm
kel ling. 2= πd ÷ 2 = × 28 ÷ 2 = 44 cm
keliling bangunan diarsir = 84 - (22 + 44) = 18 cm