jika luas lingkaran 154 cm maka jari jarinya

Materi Lingkaran

[tex] L = \pi \times r^2 \\ 154 = \dfrac{22}{7} \times r^2 \\ r^2 = 154 \times \dfrac{7}{22} = 49 \\ r = \sqrt{49} = 7~cm [/tex]

luas lingkaran = 22/7=nr2
154=22/7 r2
r2 =154x7/22
r2=49
r=√49
r=7 cm