Determining Angle Measures of Intersecting Lines CC.7.G.5 Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem.

Determining Angle Measures of Intersecting Lines

CC.7.G.5 Use facts about supplementary, complementary, vertical, and adjacent

angles in a multi-step problem to write and solve simple equations for an unknown

angle in a figure.

Warm Up

• Use the figure to answer the following:

1

2 3

45

Do <1 and <2 form a linear pair?

Do <4 and <5 form a linear pair?

Do <5 and <3 form vertical angles?

Do <1 and <3 form vertical angles?

Are <1 and <5 complementary angles?

Are <2 and <3 supplementary angles?

Are <5 and <4 complementary angles?

Video

• http://www.khanacademy.org/math/geometry-1/core-geometry/v/angles-at-the-intersection-of-two-lines

Directions:Determine the missing angle.

#1

45º?º

#1

45º135º

#2

65º

?º

#2

65º

25º

#3

35º

?º

#3

35º

35º

#4

50º

?º

#4

50º

130º

#5

140º

?º

#5

140º

140º

#6

40º

?º

#6

40º

50º