Solving for an Unknown Variable Using Angle Relationships

What are complementary angles?

• Angles that add up to 180°
• Angles that add up to 90°
• Angles that are equal to each other
• Angles that are opposite of each other when lines intersect.

Tags

CCSS.7.G.B.5

What are supplementary angles?

• Angles that add up to 180°
• Angles that add up to 90°
• Angles that are equal to each other
• Angles that are opposite of each other when lines intersect

Tags

CCSS.7.G.B.5

Identify the angle pair.

• Complementary angles
• Congruent angles
• Linear Pair
• Vertical Angles

Tags

CCSS.7.G.B.5

Identify the angle pair.

• complementary angles
• linear pair
• supplementary 
• vertical angles

Tags

CCSS.7.G.B.5

Find angle 1 if angle 2 = 36

• 144
• 54
• 36
• 154

Tags

CCSS.7.G.B.5

Find x if the angles are complementary.

• 15
• 75
• 25
• 90

Tags

CCSS.7.G.B.5

Find x

• 30
• 60
• 90
• 150

Tags

CCSS.7.G.B.5

Find x

• 53
• 90
• 37
• 27

Tags

CCSS.7.G.B.5

Find x

• 74
• 148
• 37
• 90

Tags

CCSS.7.G.B.5

What equation would you use? Then solve for x

• 65 = 5x; x = 13

• 65 + 5x = 90; x = 5

• 65 + 5x = 180; x = 23

• 65(5x) = 90 x = 18/65

Tags

CCSS.7.G.B.5