~ Quiz ~ - Universityku

(2/8)

soal
tentukan luas lingkaran yg memiliki
A. jari² 343
B. jari² 314
C. diameter 24

Note: pakai cara ya

~ Quiz ~

Soal:

tentukan luas lingkaran yg memiliki

A. jari-jari 343

B. jari-jari 314

C. diameter 24

_____________________________

A.= π r²

= ²²/7 × 343 ×343

= 22×49×343

= 1.078×343

= 369.754

B.= π r²

= 3,14×314×314

= 985,96×314

= 309.591,44

C.= π r²

= 3,14×12×12

= 3,14×144

= 452,16

Diketahui:

A. jari-jari=343 cm

B. jari-jari=314 cm

C. diameter=24 cm

Ditanya:

Luas lingkaran

Jawaban dan langkah-langkah:

$sfbf A. : L = pi times r times r$

$sf bf = frac{22}{7} times 343 times 343$

$sf bf = frac{22}{cancel{7}} times cancel{343} times 343$

$sf bf = 22 times 49 times 343$

$sf bf = 1.078 times 343$

$sf bf = 369.754 : {cm}^{2}$

$\$

$sf bf B. : L = pi times r times r$

$sfbf = 3,14 times 314 times 314$

$sf bf = 3,14 times 98.596$

$sfbf = 309.591,44 : {cm}^{2}$

$\$

$sfbf C. : r = d div 2$

$sfbf = 24 div 2$

$sfbf = 12 : cm$

$\$

$sfbf L = pi times r times r$

$sfbf = 3,14 times 12 times 12$

$sfbf = 3,14 times 144$

$sfbf = 452,16 : {cm}^{2}$