tolong ya nomor 26..makasiiih...

Diameter = 42 cm
Jari jari (r) = diameter : 2 = 21 cm
L 3/4 lingkaran = 3/4 π r kuadrat
= 3/4 X 22/7 X 21 X 21
= 99 X 21 : 2
= 1039,5 cm persegi

Dik = diameter : 42 
jari-jari : 21

Dit = luas

L=3/4 × 22/7× 21× 21
= 1039,5 
= d

Maaf kalau salah =D