Tentukan luas yg diameternya diketahui sebagai π=22/7 A. d=17,5 B. d=21 C. d=24,5 D.d=28 E. d=31,5
MelianaLina
A. 22/7 × r^2 22/7 x 8,75 × 8,75 22/7 x 76,5625 22 x 10,9375 240,625 b. 22/7 x 10.5 x 10.5 22/7 x 110,25 22 x 15,75 346,5 c. 22/7 x 12,25 x 12,25 22/ 7 x 150,0625 22 x 21,4375 471,625 d. 22/7 × 14 x14 22/7 × 196 22 × 28 616 e 22/7 × 15,75 ×15,75 22/7 × 248,0625 22 × 35,4375 779,625
22/7 x 8,75 × 8,75
22/7 x 76,5625
22 x 10,9375
240,625
b. 22/7 x 10.5 x 10.5
22/7 x 110,25
22 x 15,75
346,5
c. 22/7 x 12,25 x 12,25
22/ 7 x 150,0625
22 x 21,4375
471,625
d. 22/7 × 14 x14
22/7 × 196
22 × 28
616
e 22/7 × 15,75 ×15,75
22/7 × 248,0625
22 × 35,4375
779,625
a = 1/4 . 22/7 . 17,5 . 17,5 =240,625
b= 1/4. 22/7 . 21 . 21 =346,5
c= 1/4 . 22/7 . 24,5 . 24,5 =471.625
d=1/4 . 22/7 . 28 . 28= 616
e= 1/4 . 22/7 .31,5 . 31,5 =779.625
semoga bisa membantu :)