Tentukan dimeter dan jari-jari A. keliling = 69,08 cm B. keliling = 110 cm

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Tentukan dimeter dan jari-jari
A. keliling = 69,08 cm
B. keliling = 110 cm

Jawaban:

a.

d = 69.08 div 3.14 = 22 cm\ r = 22 div 2 = 11cm

b.

d = 110 div frac{22}{7} = 110 times frac{7}{22} = 35 \ r = 35 div 2 = 17.5

Jawaban:

a. r = 11 cm

b. r = 17,5 cm

Penjelasan dengan langkah-langkah:

a.keliling lingkaran = 2πr

69,08 = 2×3,14×r

r = 69,08 dibagi ( 2×3,14 )

r = 69,08 dibagi 6,28

r = 11 cm

b.keliling lingkaran = 2πr

110 = 2×22/7×r

r = 110 dibagi ( 2×22/7 )

r = 110 dibagi 6,28571429

r = 17,5 cm