di ketahui sebuah lingkaran a r =49 cm b r =42 cm c d =42 cm berapakah keliling nya
![]()
Jawaban:
rumus keliling lingkaran = 2 x π x r
r lingkaran a = 49 cm
k = 2 x 22/7 x 49
k = 2 x 22 x 7
k = 308 cm
r lingkaran b = 42 cm
k = 2 x 22/7 x 42
k = 2 x 22 x 6
k = 264 cm
d lingkaran c = 42 cm
d = 1/2 r = 1/2 x 42 = 21 cm
k = 2 x π x r
k = 2 x 22/7 x 21
k = 2 x 22 x 3
k = 132 cm
atau
k = π x d
k = 22/7 × 42
k = 22 x 6
k = 132 cm
[answer.2.content]
