Tolong dong kukasi 100 poin

Jawaban:

Sudah Ada Di Foto ya, maaf Klo tulisannya g jelas:) geser ke Kanan utk Liat bagian C y!

Penjelasan dengan langkah-langkah:

a)

Keliling = 44 Cm

Diameter :

K = π × d

44 = 22/7 × d

d = 44 × 7/22

d = 14 Cm

Jari jari = D ÷ 2 = 14 ÷ 2 = 7 Cm

b)

Keliling = 132 Cm

Diameter :

K = π × d

132 = 22/7 × d

d = 132 × 7/22

d = 42 Cm

Jari jari = D ÷ 2 = 42 ÷ 2 = 21 Cm

c)

Keliling = 125,6 Cm

Diameter :

K = π × d

125,6 = 3,14 × d

d = 125,6 ÷ 3,14

d = 40 Cm

Jari jari = D ÷ 2 = 40 ÷ 2 = 20 Cm