Oiiiiiiiiiiiiiiii tlong​

1. Luas = π x r x r

= 3,14 x 20 x 20

= 3,14 x 400

= 1256 cm²

2. K=2πr

88=2.22/7.r

88=44/7.r

r=88×7/44=14cm

L=πr²

= 22/7×14×14=616 cm²

3. L: πr²

L: 3,14 ×15×15

L: 47,1 × 15

L: 706,5 cm²

4. L=πr²

L=(3,14)(4)²

L=(3,14)(16)

L=50,24 cm²

5. luas lingkaran 1= π×r²

= 22/7× 7²

= 154 m²

luas lingkaran 2= π×r²

= 3,14×9²

= 254,34 m²

luas jalan= 254,34-154= 100,34 m²