tolong jawab no 27 dan 28

28). |~| = 22/7 = 3,14
d = 14 cm
r = 7 cm
L = |~| x r^2
= 22/7 x 7^2
= 22/7 x 49
= 154 cm2
K = 2 x |~| x r
= 2 x 22/7 x 7
= 44 cm

27) luas = luas segitiga + luas persegi panjang
= 1/2 . DC . t + AB . AD
= 1/2 . 16 . 6 + 16 . 10
= 48 + 160
= 208 m^2

28) d = 14 cm => r = 7 cm
Luas = πr^2 = 22/7 . 7 . 7 = 154 cm^2
Keliling = πd = 22/7 . 14 = 44 cm