gambarlah bangun lingkaran panjang jari2 7cm hitung keliling dan luasnya #ngga usah di gambar

K = π.d
=22/7.14 = 44 cm

L =π.r²
=22/7.49
=154 cm²

keliling lingkaran
[tex]2 \times \pi \times r = 2 + \frac{22}{7} \times 7 = 44[/tex]
luas lingkaran
[tex]\pi \times {r }^{2} = \frac{22}{7} \times {7}^{2} = \frac{22}{7} \times 49 = 154[/tex]