Triangle Similarity Missing Sides

Find the missing length.

• 10

• 21

• 35

• 9

If a line divides any two sides of a triangle in the same ratio then the line is ----------- to the third side

• parallel

• perpendicular

• co-incides

• none of the above

Tell whether the triangles are similar or not.

• a

• b

Calculate the value of the scale factor between the 2 triangles

• 2.5

• 3

• 3.5

• 4

Are the triangles similar?

• Yes

• No

What is ratio of any two corresponding sides?

• Scale Factor

• Corresponding Sides

• Similar Figures

What is the value of X?

• X=4

• X=6

• X=3

• X=2

When proving these triangles similar, what would you write in for the missing reason?

• Math

• Corresponding sides are proportional

• Corresponding sides are congruent

• SSS similarity postulate

What reasons complete the proof?

• Given, AA Similarity Postulate

• Vertical Angle Theorem, AA Similarity Postulate

• Reflexive Property, SAS Similarity Postulate

• Definition of Angle Bisector, SSS Similarity Postulate

How do these triangles appear to be similar?

• AA

• SAS

• SSS

• Not Similar