 QUIZ
Dilations and Similarity
a year ago by 20 questions
Q.

What is Dilation?

Dilation means to enlarge or reduce a shape

Dilation means to flip over a line

Dilation means two figures that look alike

Dilation means to make a shape smaller

Q.

A triangle has vertices with coordinates A(2,0), B(3, -1) and C(-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of C'?

(1,-2)

(-6,-15)

(-2/3,-5/3)

(-5,-8) Q.

Are these two figures congruent, similar or neither?

Congruent

Neither

Similar

Q.

State the coordinate of the image of point B (-10,-6) after a dilation with a scale factor of 1/2.

(5,3)

(20,12)

(-20,-12)

(-5,-3) Q.

Choose the correct scale factor:

2.5

1.5

3.5

4 Q.

Are the triangles similar, congruent or neither?

Similar

Congruent

Neither

Q.

If two figures are similar, the corresponding angles are...

Congruent

Supplementary

Proportional

Different

Q. How does a dilation change the angles of a polygon?
It changes by the scale factor.
Dilations do not change the angles.
It is impossible to answer this question.  The angles change unpredictably.
The angles all change to larger angles.
Q. If two figures are similar, the corresponding sides are ______________.
equal
congruent
proportional
none of these Q. Solve for X.
2 ft
3 ft
4 ft
6 ft Q.

Tell whether the two figures are congruent or similar.

Congruent, because their sides are the same.

Congruent, because their sides are proportional.

Similar, because their sides are the same.

Similar, because their sides are proportional.

They are not congruent or similar. Q.

Tell whether the two figures are congruent or similar.

Congruent, because their sides are the same.

Congruent, because their sides are proportional.

Similar, because their sides are the same.

Similar, because their sides are proportional.

They are neither congruent or similar. Q.

Are these triangles similar, congruent or neither?

Similar

Congruent

Neither Q.

Are these triangles similar, congruent or neither?

Similar

Congruent

Neither Q.

Are these triangles similar, congruent or neither?

Similar

Congruent

Neither Q.

A ~ B. What is the scale factor of the dilation of A to B?

$\frac{4}{3}$

$\frac{3}{4}$

3

4 Q. What is the scale factor from triangle ABC to triangle DEF?
1/2
7/3
2/1
10/3 Q.

ABC ~ XYZ. What is the scale factor of the dilation of ABC to XYZ?

$\frac{2}{3}$

$\frac{3}{2}$

2

3 Q. What is the scale factor from ABCD to MNOP?
2/3
3/2
2
3 Q.

Are these triangles similar, congruent or neither? 