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Geometry - Angle
The measures of two angles intersecting a line are (5x - 15)° and (3x + 5)°. What is x if they are opposite angles?
A
10
B
15
C
20
D
25
An angle on a straight line measures 110°. What is the measure of its adjacent angle?
A
70°
B
60°
C
80°
D
75°