Similarities

Triangle DEF is a dilation of triangle ABC

with a scale factor 2. The largest angle in

triangle ABC measures 82 ̊. What is the

largest angle measure in triangle DEF?

• 41 degrees

• 82 degrees

• 123 degrees

• 164 degrees

Based on what you know about

corresponding angles and sides in similar

polygons, are these two figures similar?

• Yes, the corresponding sides have the same scale factor

• No, the corresponding sides to not share a scale factor

Are these two triangles similar?

• yes

• no

Which triangle is not similar?

• A

• B

• C

• D

What do you

need

to prove the triangles

are similar?

• One corresponding side

• One corresponding angle

• One corresponding side and

  angle

• Two pairs of congruent angles

• 1.2 or

• 0.83 or

• 2.5 or

• 0.4 or

Triangle A has side lengths 3, 4, and 5.

Triangle B has side lengths 6, 7, and 8.

Are these similar triangles?

• Yes the quotients of the sides have the same ratio

• No the quotients of the sides do not have the same ratio

What is the quotient of the medium side divided by the smaller side?

• 1.5

• 1.25

• 2.25

• 0.44

These two trapezoids are similar.  What is the measure of angle L?

• 103

• 125

• 55

• 77

These two quadrilateral are

similar. Which transformation would

not help to prove it?

• Translation

• Rotation

• Reflection

• Dilation