tolong jawab pake cara yang nomer 24

MK= 22,5 cm
KO= 10,5cm
KL= 10,5 . 2
= 21 cm
K ΔMKL = (22,5 . 2 ) + 21
= 45+21= 66 cm
K1\2O = 1/2 . π . d = 1/2 . 22/7 . 21 = 33 cm
K diarsir= 66-33= 33 cm
ps= (.) sama dengan kali

r=KO = 10.5 cm
d= 10,5 x 2 = 21 cm

K KL = 1/2πd = 1/2 x 22/7 x 21
                       = 1/2 x 66
                       = 33 cm
K bangun= KM+ML+KL = 22,5+22,5+33 = 78 cm 

jawab.C