Question

Diketahui keliling 88cm, phi = 22/7.
Hitunglah:
a. Jari jari lingkaran
B. Diameter lingkaran
C. Luas lingkaran

Answer 1

A)
K = 88
2 x phi x r = 88
2 x 22/7 x r = 88
44/7 x r = 88
r = 88 : 44/7
r = 88 x 7/44
r = 14 cm


b)
d = 2 x r = 2 x 14 = 28 cm


c)
L.lingkaran
= phi x r²
= 22/7 x 14 x 14
= 616 cm²

Answer 2

A.) Jari Jari Lingkaran (r) :
→ Keliling = 2πr
→ 88 = 2 x 22/7 x r
→ 88 = 44/7 x r
→ r = 88 : 44/7
→ r = 88 x 7/44
→ r = 14 cm

b.) Diameter Lingkaran (r) :
→ d = 2 x Jari Jari
→ d = 2 x 14 cm
→ d = 28 cm

c.) Luas Lingkaran (L) :
→ L = πr²
→ L = 22/7 x 14 cm x 14 cm
→ L = 616 cm²

"Maaf apabila ada yang salah"