Question

Bantu cari luas
No
1.40cm
2.56cm
3.28cm
4.14cm
5.21cm

Answer 1

1) L = phi x r xr
= 3,14 × 20 × 20
= 1256cm2

2). L = phi x r x r
= 22/7 × 28 × 28
= 2464 cm2

3). L = 1/2 × phi x r x r
= 1/2 x 22/7 × 14 × 14
= 308 cm2

maaf kalau salah

Answer 2

1. L = 1/4 x phi x d x d
= 1/4 x 3,14 x 40 x 40 = 1.256 cm"

2. L = 1/4 x phi x d x d
= 1/4 x 22/7 x 56 x 56 = 2.464 cm"

3. L = 1/2 x 1/4 x phi x d x d
= 1/2 x 1/4 x 22/7 x 28 x 28 = 308 cm"

4. L = 1/4 x phi x r x r
= 1/4 x 22/7 x 14 x 14 = 154 cm"

5. L = 3/4 x phi x r x r
= 3/4 x 22/7 x 21 x 21 = 1.039,5 cm"

" = pangkat 2

moga bantu ya.... ^^
klo slh maklum -,-