Question

Hitunglah luas daerah lingkaran dengan diameter berikut ini.
A.50m
b.1,4 m
c.35m
d.25cm
e.18cm

Answer 1

1. 1962,5 m2
2. 1,54 m2
3. 962,5 m2
4. 490.625 m2
5. 254,34 m2

☆soal 1, 4, 5 pke 3,14★
★soal 2, 3 pke 22/7☆

Answer 2

A) phi.r.r = 3.14 x 25 x 25 = 1962.5 m
b) phi.r.r = 22/7 x 0,7 x 0.7 = 1.54 m
c) phi.r.r = 3.14 x 17.5 x 17.5 = 961.625 m
d) phi.r.r = 3.14 x 12.5 x 12.5 = 490.625 m
e) phi.r.r = 3.14 x 9 x 9 = 254.34 m