isiin yah guys........

luas 1/4 lingkaran = 1/4 phi r2

[tex] \frac{1}{4} \times \frac{22}{7} \times 18 \times 18 [/tex]

[tex] \frac{1782}{7} [/tex]

[tex]254.34[/tex]

Luas ¼lingkaran = ¼ × phi × r²
= ¼ × 22/7 × 18²
= 1782/7
= 254,34 cm²