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klilng = 2 x π x r
= 2 x 22/7 x 14
= 44 x 2
= 88 cm
luas = π x r²
= 22/7 x 14 x 14
= 44 x 14
= 616 cm²
soal nomer 2
kliling = 2 x 22/7 x 35
= 44 x 5
= 220 cm
luas = 22/7 x 35 x 35
= 3850 cm²
soal nomer 3
kliling = 2 x 22/7 x 56
= 44 x 8
= 352 cm
luas = 22/7 x 56 x56
= 22x 8 x 56
= 9856 cm²
soal nomer 4
kliling = 2 x π x r
= 2 x 3,14 x 20
= 125,6 cm
luas = 3,14 x 20 x 20
= 1256 cm²
soal nomer 5
kliling = 2 x 3,14 x 40
= 251,2 cm
luas = 3,14 x 40 x 40
= 5024 cm²
soal nomer 6
kliling = π x d
= 22/7 x 70
=22x 10
= 220 cm
luas = 1/4 x 22/7 x 70 x 70
= 11 x 5 x 70
= 3850 cm²
soal nomer 7
kliling = 22/7 x 84
= 22 x 12
= 264 cm
luas = 1/4 x 22/7 x 84 x 84
= 11 x 6 x 84
= 5544 cm²
soal nomer 8
kliling = 3,14 x 100
= 314 cm
luas = 1/4 x 3,14 x 100 x 100
= 314 x 25
= 7850 cm²