Tolong dijawab no 11-12

12) 1/4 x 22/7 x 42 x 42
=1/4 x 22/7 x 1.764
=1/4 x 252 x 22
=1/4 x 5.444
= 1.386 (b)

11. luas trapesium = (74+42) x 35 :2= 4.060:2=2.030

12. 1/4 luas lingkaran = 1/4 x 22/7 x 42 x 42 = 1.386