9)
a = b (karena sehadap)
2x + 80 = 160
2x = 160 - 80
2x = 80
x = 40
10)
aob = eod
bod = 90 + (90 - 37)
bod = 90 + 53
bod = 143
9. <B=<A
160°=(2x + 80°)
2x=160-80
=80°
x=40° (A.)
10. <AOB dan <DOB adalah sudut
dalam sepihak. Maka,
<DOB= 180° - <AOB
<DOB= 180° - 37
<DOB= 143° (C.)
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9)
a = b (karena sehadap)
2x + 80 = 160
2x = 160 - 80
2x = 80
x = 40
10)
aob = eod
bod = 90 + (90 - 37)
bod = 90 + 53
bod = 143
9. <B=<A
160°=(2x + 80°)
2x=160-80
=80°
x=40° (A.)
10. <AOB dan <DOB adalah sudut
dalam sepihak. Maka,
<DOB= 180° - <AOB
<DOB= 180° - 37
<DOB= 143° (C.)