Quiz about Grade 7 quiz

Question 1

What is Dilation?

Accepted Answer

Dilation means to enlarge or reduce a shape

Answer

Dilation means to flip over a line

Answer

Dilation means two figures that look alike

Answer

Dilation means to make a shape smaller

Question 2

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'?

Accepted Answer

(-6,-15)

Answer

(1,-2)

Answer

(-2/3,-5/3)

Answer

(-5,-8)

Question 3

Are these two figures congruent, similar or neither?

Accepted Answer

Neither

Answer

Congruent

Answer

Similar

Question 4

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

Accepted Answer

(-5,-3)

Answer

(5,3)

Answer

(20,12)

Answer

(-20,-12)

Question 5

Choose the correct scale factor:

Accepted Answer

1.5

Answer

2.5

Answer

3.5

Answer

4

Question 6

How does a dilation change the angles of a polygon?

Accepted Answer

Dilations do not change the angles.

Answer

It changes by the scale factor.

Answer

It is impossible to answer this question.  The angles change unpredictably.

Answer

The angles all change to larger angles.

Question 7

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

Accepted Answer

proportional

Answer

equal

Answer

congruent

Answer

none of these

Question 8

The two triangles are similar. Solve for X.

Accepted Answer

2 ft

Answer

3 ft

Answer

4 ft

Answer

6 ft

Question 9

Tell whether the two figures are congruent or similar.

Accepted Answer

Similar, because their sides are proportional.

Answer

Congruent, because their sides are the same.

Answer

Congruent, because their sides are proportional.

Answer

Similar, because their sides are the same.

Answer

They are not congruent or similar.

Question 10

Tell whether the two figures are congruent or similar.

Accepted Answer

Congruent, because their sides are the same.

Answer

Congruent, because their sides are proportional.

Answer

Similar, because their sides are the same.

Answer

Similar, because their sides are proportional.

Answer

They are neither congruent or similar.

Question 11

What is the scale factor from triangle ABC to triangle DEF?

Accepted Answer

2/1

Answer

1/2

Answer

7/3

Answer

10/3

Question 12

What is the scale factor from triangle ABC to triangle DEF?

Accepted Answer

2/1

Answer

1/2

Answer

7/3

Answer

10/3

Question 13

What is the scale factor from ABCD to MNOP?

Accepted Answer

2/3

Answer

3/2

Answer

2

Answer

3

Question 14

Find the slope of the line using slope triangles

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 15

Find the slope of the line using slope triangles

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 16

Find the slope of the line using slope triangles

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 17

Find the slope of the line using slope triangles

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 18

Find the slope of the line using slope triangles

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 19

Triangle PQR is the image of triangle JKL after a dilation. Is the dilation an enlargement or a reduction? Explain.

Accepted Answer

Enlargement, because the image is larger than the original figure.

Answer

Enlargement, because the image is smaller than the original figure.

Answer

Reduction, because the image is smaller than the original figure.

Answer

Reduction, because the image is larger than the original figure.

Question 20

Rajesh is making pennants in preparation for a school soccer game. He wants the pennants to be similar triangles. Which of these triangles could he use for the pennants?

Accepted Answer

QRS and XYZ

Answer

QRS and TVW

Answer

TVW and JKL

Answer

TVW and XYZ

Question 21

Are ABC and LMN similar?

Accepted Answer

No

Answer

Yes

Question 22

Triangle DEF is similar to triangle ABC. What is a sequence of transformations that maps triangle ABC to triangle DEF?

Accepted Answer

Rotation then dilation with scale factor of 2

Answer

Reflection then rotation

Answer

Rotation then dilation with scale factor of 0.5

Answer

Rotation then translation

Question 23

Triangle DEF is similar to triangle ABC. What is a sequence of transformations that maps triangle ABC to triangle DEF?

Accepted Answer

Rotation then dilation with scale factor of 2

Answer

Reflection then rotation

Answer

Rotation then dilation with scale factor of 0.5

Answer

Rotation then translation

Question 24

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

Accepted Answer

(-5,-3)

Answer

(5,3)

Answer

(20,12)

Answer

(-20,-12)

Question 25

Choose the correct scale factor:

Accepted Answer

1.5

Answer

2.5

Answer

3.5

Answer

4

Question 26

Which is the scale factor in the dilation?

Accepted Answer

$$\frac{1}{2}$$

Answer

$$\frac{1}{4}$$

Answer

2

Answer

2

Question 27

Which graph illustrates $$\Delta EFG$$ dilated by a scale factor of $$\frac{1}{2}$$ ?

Accepted Answer

Question 28

Which sequence of transformations shows that Figure 1 is congruent to Figure 2?

Accepted Answer

Figure 2 is obtained by reflecting Figure 1 across the y-axis and then translating it 2 units left and 8 units down.

Answer

Figure 2 is obtained by reflecting Figure 1 across the x-axis and then translating it 2 units right and 8 units up.

Answer

Figure 2 is obtained by reflecting Figure 1 across the x-axis and then translating it 2 units left and 8 down.

Answer

Figure 2 is obtained by reflecting Figure 1 across the y-axis and then translating it 2 units right and 8 units up.

Question 29

If the two triangles are similar, what is the length of side b?

Accepted Answer

5 m

Answer

4 m

Answer

6 m

Answer

7 m

Question 30

Which is a true statement?

Accepted Answer

Figure 1 is similar to Figure 2.

Answer

Figure 1 is congruent to Figure 2.

Answer

Figure 1 is both similar and congruent to Figure 2.

Answer

Figure 1 is neither similar nor congruent to Figure 2.

Question 31

Are these triangles similar? How do you know?

Accepted Answer

They are not similar. The sides are not proportional.

Answer

They are not similar. We need angles to prove that triangles are similar.

Answer

The triangles are similar by SAS Triangle Similarity Theorem

Answer

The triangles are similar by SSS Triangle Similarity Theorem

Question 32

What is the scale factor of the dilation?

Accepted Answer

1 : 2

Answer

6 : 3

Answer

3 : 6

Answer

2 : 1

Question 33

What is the scale factor of the dilation?

Accepted Answer

1 : 2

Answer

6 : 3

Answer

3 : 6

Answer

2 : 1

Question 34

Which of these rectangles are similar?

Accepted Answer

Only rectangles 1 and 3 are similar.

Answer

None of these are similar. Rectangles cannot be similar

Answer

All rectangles are similar, so Rectangles 1, 2, and 3 are similar.

Answer

Only rectangles 1 and 2 are similar.

Answer

Only rectangles 2 and 3 are similar.

Question 35

Find the value of x, and use it to find KM.

Accepted Answer

x = 10, KM = 25

Answer

x = 11, KM = 28

Answer

x = 13.3 KM = 34.9

Answer

x = 4.3, KM = 8

Grade 7 quiz

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