Lines and Triangles

Find the indicated angle. (What is ?)

• 91°

• 81°

• 89°

• 109°

Are the triangles similar?

• No

• Yes, because they look the same

• Yes, because the angles are congruent

• Not enough information given.

Are the triangles similar? If so, why?

• No

• Yes, they look like it.

• Not enough information is given.

• Yes, Angle-Angle Triangle Similarity Theorem

Find side length X.

• 30

• 25

• 15

• 40

Are the triangles similar?

• Yes

• No

Find the missing angle TSR.

• A

• B

• C

• D

Find the measure of angle ABC.

• 38

• 47

• 40

• 70

In the figure below, l₁ is parallel to l₂. Which of the following is true? Select two that apply.

• w = a

• y + b = 180

• x + d = 180

• Angle x and Angle z are corresponding angles.

• 21

• 39

• 45

• 126

Find the missing angle x°.

_{The figure is not drawn to scale}.

• 19

• 29

• 43

• 66