TOLONG JAWAB 2 SOAL AJA MTK PAKAI CARA YA PLZ BESOK DIKUMPUL....

Luas trapesium = 1/2 + (a+b) x t
                            = 1/2 x (40+20) x 15
                            = 1/2 x 60 x 15
                            = 450 cm2
Luas Lingkaran seluruh = 1/4 x 22/7 x r x r
                                         =  1/4  22/7 x 7 x 7
                                         = 38,5 cm2
Luas lingkaran dalam = 1/4 x 22/7 x 3,5 x 3,5
                                      = 9,625 cm2
Luas lingkaran yang diarsir = 38,5 - 9,625
                                               = 28,875 cm2