Finding Missing Angles

• x = 118

• x = 108

• x = 28

• x = 58

• x = 62

Find the missing angle.  Find x.

• 20^o

• 70^o

• 160^o

• 180^o

What angle is vertical to angle 2?

• ∠4

• ∠1

• ∠2

• ∠5

Vertical angles are always

• acute

• total 180 degrees

• congruent (equal measures)

• adjacent angles

Find the missing angle.  Find x.

• 20^o

• 70^o

• 160^o

• 180^o

Mathematical Equivalence

ON

If two angles in a triangle measure 45 degrees and 55 degrees, what is the measure of the third angle?

• 70 degrees

• 80 degrees

• 90 degrees

• 100 degrees

Find the missing angle.

• 53

• 67

• 77

• 43

Mathematical Equivalence

ON

What is the measure of an angle that is complementary to a 25-degree angle?

• 65 degrees

• 75 degrees

• 155 degrees

• 105 degrees