Panjang diameter suatu lingkaran yg luasnya 78,5 cm²adalah
Jawaban Terkonfirmasi
L = phi .r ^2
78,5 = 3,14. r^2
78,5/3,14 =r^2
25 =r^2
5 =r
d= 2×r
=2×5
=10
Panjang diameter suatu lingkaran yg luasnya 78,5 cm²adalah
L = phi .r ^2
78,5 = 3,14. r^2
78,5/3,14 =r^2
25 =r^2
5 =r
d= 2×r
=2×5
=10