Solving problems involving angles and equations

x = ______

 $\angle1\ and\ \angle2\ are\ what\ types\ of\ angles?$  

• adjacent

• vertical

• complementary

• supplementary

Adjacent angles are always congruent.

• True

• False

Vocabulary: Angles that are next to each other (share a side)

• adjacent
• complementary
• vertical
• corresponding 

Two angles are congruent and complementary. Find their size.

• 30

• 45

• 60

• 90

A triangle’s angle measures are in the extended ratio of 1 : 2 : 3. Find the measures of the angles.

• 30^o, 60^o, 90^o

• 10^o, 20^o, 30^o

• 20^o, 40^o, 60^o

• 30^o, 50^o, 100^°

What are adjacent angles?

• Angles that are across from each other
• Angles that add to 180
• Angles that add to 90
• Angles that are next to each other

What is the value of x?

• 40

• 50

• 140

• 8

Practice 1c: Name a pair of linear pair angles

Name a pair of angles that form a linear pair.

• Angles 1 and 2
• Angles 2 and 4
• Angles 5 and 8
• Angles 9 and 10