tolong ya pake cara ... yang bisa aja buat bsk nih tolong yaaa....

maaf kalau salah dan cuma tau itu aja yaa. GOODLUCK

65.
Besar sudut BOC = 180-75
= 105°
75 = 10
-------------- (dikali silang)
105 = x

75x = 1.050
x = 14 cm
Jadi, panjang BC = 14cm
Jawaban = b.14cm

66.
panjng busur = 144/360 x 22/7x14
= 2/5 x 44
= 88/5
= 17 3/5
Jawaban = b. 17 3/5

67.
90 = 10
----------- (dikali silang)
x = 6
10x = 540
x = 54°
Jawaban = d. 54°

70.
60 = 12
----------- (dikali silang )
105 = x
60x = 1.260
x = 21
Jawbaan = c.21 cm*2

71.
Luas Juring = 135/360 x 48
= 3/8 x 48
= 18 cm*2
Jawbaan = a. 18 cm*2

73.
105 = 21
------------ (dikali silang )
x = 6
21x = 630
x = 30°
Jawbaan = d. 30°

74.
besar sudut BOC = 180 - 45°
= 135°

Luas juring = 135/360 x 22/7 x 7 x 7
= 3/8 x 154
= 57 6/8