11.A 1= A 3 = 5 x°
A 4 = A 2= 4 x•
A 1+ A 4 = 180° [berpelurus]
4 x + 5 x = 9 x
9x= 180°
x= 180 ÷ 9
x= 20°
A1= 5 x= 100°
B1= 100° (sehadap).
JAWABAN:
10.C
11.D
12.B
MAAF KALO SALAH YA....
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11.A 1= A 3 = 5 x°
A 4 = A 2= 4 x•
A 1+ A 4 = 180° [berpelurus]
4 x + 5 x = 9 x
9x= 180°
x= 180 ÷ 9
x= 20°
A1= 5 x= 100°
B1= 100° (sehadap).
JAWABAN:
10.C
11.D
12.B
MAAF KALO SALAH YA....