Exterior and Interior Angle Theorems

The Exterior Angle Theorem states that...

• < 4

• 90

• < 3

• 180

• 95

• 85

• 35

• 45

• 26

• 36

• 85

• 144

• 89

• 211

• 81

• 119

Def Alt Ext Angles

Alt Ext Angle Thm

Alt Ext Angle Convese

• Def Alt Ext Angles

• Alt Ext Angle Thm

• Alt Ext Angle Convese

• Alternate Exterior Angles Converse

• Alternate Interior Angles Theorem

• Alternate Exterior Angles Theorem

• Consecutive Interior Angles Converse

Find the measurement of the unknown angle, x.

• 142

• 38

• 180

• 90

Find the value of x.

• A

• B

• C

• D

• 145

• 113

• 102

• 78

Using the given, determine if the conclusion is valid. If so, justify it.
Given:

• Not valid

• Alternate interior angles theorem

• Alternate interior angles converse

• Alternate exterior angles theorem

• Alternate exterior  angles converse