kakak yg baik tlng bantuanya no a sampai f.di isi caranaya.mksi kka

a ) Keliling = 2 × π × r
= 2 × 22/7 × 49
= 308 m

b ) 2 × 22/7 × 21
= 132 m

c ) 2 × 3,14 × 5
= 31,4 cm

d ) 2 × 3,14 × 12
= 75,36 cm

e ) 2 × 22/7 × 10,5
= 66 cm

f ) Keliling = π × d
= 22/7 × 70
= 220 cm

a)
[tex]k = 2\pi \: r \\ k = 2. \frac{22}{7} .49 \\ k = 44.7 \\ k = 308 \: cm[/tex]
yang b)
[tex]k = 2\pi \: r \\ k = 2. \frac{22}{7} .21 = 44.3 = 132 \: cm[/tex]
c)
[tex]k = 2 \times (3.14) \times 5 \\ = 31.4[/tex]
e)
[tex]k = 2. \frac{22}{7} .10.5 \\ = 44 \times 1.5 \\ = 66[/tex]
f)
[tex]d = 70 \\ r = \frac{70}{2} = 35 \\ k = 2\times 3.14 \times 35 \\ = 31.4 \times 7 \\ = 219.8[/tex]
Ikuti terbaik