15. What is the common vertex of the angles in the figure? point A
B. point B
C. point
16. ZCBD and 2DBA are adjacent angles, what is their common side?
D. point
D. ray DE
A. ray BA
B. ray BC
C. ray BD
17. If m2 CBD = 90 and m2 ABD = 30, what is m m CBA?
A. 1800
B. 120°
C. 600
D.450
18.If two angles form a linear pair and the measure of one angle is 30°, what is
of the other angle?
A. 180°
B. 1509
C. 90°
D. 60°
B. point B
C. point
16. ZCBD and 2DBA are adjacent angles, what is their common side?
D. point
D. ray DE
A. ray BA
B. ray BC
C. ray BD
17. If m2 CBD = 90 and m2 ABD = 30, what is m m CBA?
A. 1800
B. 120°
C. 600
D.450
18.If two angles form a linear pair and the measure of one angle is 30°, what is
of the other angle?
A. 180°
B. 1509
C. 90°
D. 60°
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