Bisa GK kak untuk yg phi nya itu jangan pake 3,14 klo bisa pake 22/7 ok kk mohon bantuannya ya ☺️
Jawab:
A.
L = [tex]113\frac{1}{7}[/tex] cm
K = [tex]37\frac{5}{7}[/tex] cm
B.
L = [tex]14\frac{1}{7}[/tex] cm
K = [tex]37\frac{5}{7}[/tex] cm
Penjelasan dengan langkah-langkah:
L = π × r²
K = 2 × π × r
A.
d = 12 cm
r = [tex]\frac{1}{2}[/tex]d = 6
L = π × r² = [tex]\frac{22}{7}[/tex] × 6² = [tex]\frac{792}{7}[/tex] = [tex]113\frac{1}{7} }[/tex] cm
K = 2 × π × r = 2 × [tex]\frac{22}{7}[/tex] × 6 = [tex]\frac{264}{7}[/tex] = [tex]37\frac{5}{7}[/tex] cm
B.
r = 4,5
L = π × r² = [tex]\frac{22}{7}[/tex] × 4,5 = [tex]\frac{99}{7}[/tex] = [tex]14\frac{1}{7}[/tex] cm
K = 2 × π × r = 2 × [tex]\frac{22}{7}[/tex] × 4,5 = [tex]\frac{198}{7}[/tex] = [tex]28\frac{2}{7}[/tex] cm
