HKDSE Math
AngT2
Adjacent Angles Supplementary
If $\angle AOC+\angle BOC=180^\circ$,
then $AOB$ is a straight line.
adj. $\angle$s supp.
鄰角互補
若 $\angle AOC+\angle BOC=180^\circ$,
則 $AOB$ 是直線。
鄰角互補
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