Similarity and Proof

Which of the following is NOT true about similar figures?

• A) Similar figures always have the same shape.
• B) Similar figures always have the same size.
• C) Similar figures always have corresponding angles that are equal.
• D) Similar figures always have corresponding sides that are proportional.

If two figures are similar, the corresponding sides are ______________.

• equal
• congruent
• proportional
• none of these

If two figures are similar their angles are______.

• proportional
• congruent
• supplementary
• complementary

What triangle congruence criteria is shown in the given diagram?

• AAS
• ASA
• SSA
• SAS

Are the triangles congruent, if yes, why?

• SAS
• ASA
• AAS
• Not Congruent

Which of the following is not a valid reason to prove congruent triangles?

• ASA
• SAS
• SSS
• AAA

What is Dilation?

• Dilation means to enlarge or reduce
• Dilation means to reflect on something
• Dilation means to like something
• Dilation means to make something different by making it smaller

A triangle has vertices A(0,0), B(8,0), C(3,-2). Find the coordinates of the triangle after a dilation with a scale factor of  4. The dilation is (X,Y) --- (4x,4y)

• A(3,3), B(4,4), C(-3,-4)
• A(-4,8), B(6.5,8), C(7,7)
• A(0,0), B(32,0), C(12,-8)

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

A scale factor of less than one means

• that the image will be larger than the pre-image.
• That the image will be the same as the pre-image.
• That you need to subtract that amount off  of each side.
• That the image will be a reduction of the pre-image.