Angle Relationships, Triangle Sum Theorem

Each of the following relationships or properties is critical to proving the Triangle Sum Theorem EXCEPT _________.

• Substitution Property

• Angle Addition Postulate

• Linear Pair Property

Fill in statement #2.

Fill in statement .

Fill in statement .

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°

• 90°

• 180°

• 360°

Which of the following angles are remote interior angles to angle d?

• Angle a and Angle b

• Angle b and Angle c

• Angle a and Angle c

• Angle a and Angle b and Angle c

Find the missing angle using the Triangle Sum Theorem.

• 25 degrees

• 137 degrees

• 43 degrees

• 34 degrees

Find the measure of x in degrees.

• 21

• 132

• 153

• 27

What is the vertical angle to angle 4?

• Angle 2

• Angle 6

• Angle 8

• Angle 7

Find the measure of x in degrees using the Exterior Angle Theorem.

• 40

• 54

• 60

• 42