Question

tolong bantuin ya makasi mau dikumpul nnti jam 9​

Answer 1

Jawaban:

1) A. 242cm

B. 157cm

C. 264cm

D. 188,4cm

E. 320,28cm

2) A. 45,5cm

B. 200cm

C. 49cm

D. 25cm

E. 22 3/11cm

Penjelasan dengan langkah-langkah:

1) Kelililing = πxd

A. k = 22/7x77 =242cm

B. d=rx2 = 25x2 =50cm

k = 3,14x50 = 157cm

C. k=22/7x84 = 264cm

D. k=3,14x60 = 188,4cm

E. d=56x2 = 102cm

k=320,28cm

2) A. 286=22/7xd

d = 286x7/22

d = 91cm

r= 91:2=45,5cm

B. 1256=3,14xd

d = 1256x100/314

d = 400cm

r = 400:2 = 200cm

C. 308=22/7xd

d = 308x7/22

d = 98cm

r = 98:2=49cm

D. 157=3,14xd

d=157x100:314

d=50cm

r=50:2=25cm

E. 140=22/7xd

d = 140x7/22

d = 44 6/11cm

r= 44 6/11:2 = 22 3/11cm