Angle Properties of Triangles and Parallel Lines

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o

Solve for x.

• 16

• 11

• 50

• 6

In a triangle, how many total degrees are there?

• 100%

• 180 degrees

• it varies

• 360 degrees

If two of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80

• 100

• 60

• 90

What is reason #2?

• Vertical angles are congruent.

• Consecutive angles are congruent.

• Alternate interior angles are congruent.

• Definition of Bisect

What is the reason for Statement 4?

• Substitution

• Converse of Alternate Exterior Angles Theorem

• Converse of Corresponding Angles Postulate

• Converse of Same-side Interior Angles Theorem

Match the following statements with their reasons

• given

• Corresponding Angles Converse

• Congruent Supp. Theorem

• linear pair

Fill in the rest of the proof.

c

d

b

a

Transitive Property

Converse Alternate Interior Angles Thm.

Vertical Angles Theorem

Definition of Alternate Interior Angles

What is the reason for 3-4

• 3-vertical angles; 4-Transitive Property

• 3-Alt. Int. Angles; 4-Transitive prop.

• 3-vertical angles; 4-Alt. Int. angles

What is reason number 2?

• given

• alternate interior angles

• vertical angles

• corresponding angles