tolong yang nomer 7 sama 8 yaa

7. K = πd
= 22/7 . 28
= 88 cm
panjang lintasan = 88 x 1500
= 132000 (a)

8. L 1/2 lingkaran = 22/7 x 7 x 7
= 154 : 2
= 77 cm
L persegi panjang = 18 x 25
= 450 cm
L arsir = 450 - 77
= 373 cm (c)