Pairs of Angles
 Angles 1 and 3 are directly across from each other.They are called vertical angles.  They share only a vertex.  They always measure the same.  Therefore,if angle 1 measures 27 degrees, angle 3 willmeasure         degrees.1243 Angles 2 and 4 are also directly across from each other.They are  vertical too.  They share only a vertex.  They always measure the same.  Therefore,if angle 2 measures 153 degrees, angle 4 willmeasure         degrees.1243 Angles 1 and 3 are directly across from each other.They are called vertical angles.  They share only a vertex.  They always measure the same.  Therefore,if angle 1 measures 23 degrees, angle 3 willmeasure         degrees.1423 Angles 1 and 3 are directly across from each other.They are called vertical angles.  They share only a vertex.  They always measure the same.  Therefore,if angle 1 measures 123 degrees, angle 3 willmeasure         degrees.4132 Angles 2 and 4 are directly across from each other.They are called vertical angles.  They share only a vertex.  They always measure the same.  Therefore,if angle 2 measures 157 degrees, angle 4 willmeasure         degrees.1432 Angles that make 180 degrees together are calledsupplementary angles.  If we know the measure ofone angle, we can subtract from 180∘ to find themissing angle.   180∘   - 50∘   = 50oo Angles that make 180 degrees together are calledsupplementary angles.  If we know the measure ofone angle, we can subtract from 180 to find themissing angle.   180∘   - 25∘   = o25o Angles that make 180 degrees together are calledsupplementary angles.  If we know the measure ofone angle, we can subtract from 180 to find themissing angle.   180∘   - 112∘   = 112oo Angles that make 180 degrees together are calledsupplementary angles.  If we know the measure ofone angle, we can subtract from 180 to find themissing angle.   180∘   -75∘ = 75oo Angles that make 180 degrees together are calledsupplementary angles.  If we know the measure ofone angle, we can subtract from 180 to find themissing angle.   180∘   - 81∘   = x81oo Angles that make 180 degrees together are calledsupplementary angles.  If we know the measure ofone angle, we can subtract from 180 to find themissing angle.   180∘   - 52∘   = x52oo Angles that make 90 degrees together are calledcomplementary angles.  If we know the measure ofone angle, we can subtract from 90 to find themissing angle.     90∘   - 25∘ = xo25o Angles that make 90 degrees together are calledcomplementary angles.  If we know the measure ofone angle, we can subtract from 90 to find themissing angle.     90∘   - 67∘   = x67oo Angles that make 90 degrees together are calledcomplementary angles.  If we know the measure ofone angle, we can subtract from 90 to find themissing angle.     90∘   - 40∘   = xo40o The two indicated angles arex =supplementary anglescomplementary anglesvertical anglesox28o The two indicated angles arex =xsupplementary anglescomplementary anglesvertical angleso52o The two indicated angles arex =supplementary anglescomplementary anglesxvertical angleso52o The two indicated angles arex =xosupplementary anglescomplementary anglesvertical angleso141o The two indicated angles arex =supplementary anglescomplementary anglesxvertical angleso52o The two indicated angles arex =supplementary anglescomplementary anglesvertical angleso71ox The two indicated angles arex =xsupplementary anglescomplementary anglesvertical angleso34o Angle 1 + angle 2 =             degrees.  Angles 1 and 2 formcomplementary anglesadjacent anglessupplementary  anglesvertical angles12 Angle 1 + angle 2 =             degrees.  Angles 1 and 2 formadjacent anglescomplementary anglessupplementary  anglesvertical angles12 Angle 1 equals angle 2  Angles 1 and 2 formcomplementary anglesadjacent anglessupplementary  anglesvertical angles12 Angle 1, angle 2, and angle 3 equal 360 degrees.  Angles 1 and 2 formcomplementary anglesadjacent anglessupplementary  anglesvertical angles132 Solve for x.  x = 2x + 6112o Solve for x.  x = 1122x + 6o Solve for x.  x = 2x + 628o Solve for x.  x = 2x + 628o
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