Quiz about Unit 2 Test Review 8th grade math

Question 1

Rectangle A measures 12cm by 3 cm. Rectangle B is a scaled copy of Rectangle A. Select ALL measurements that could be Rectangle B.

Accepted Answer

6cm by 1.5cm

Accepted Answer

80cm by 20cm

Accepted Answer

18cm by 4.5cm

Answer

10cm by 2cm

Answer

13cm by 4 cm

Question 2

Which of these sets of angle measures could be the three angles in a triangle?

Accepted Answer

50, 60, 70

Answer

40, 50, 60

Answer

60, 70, 80

Answer

70, 80, 90

Question 3

Quadrilateral ABCD is dialted with center (0,0), taking B to B'. What are the corrdinates of A'?

Accepted Answer

(-4,6)

Answer

(1,4)

Answer

(-2,3)

Answer

(6,-4)

Question 4

Quadrilateral ABCD is dialted with center (0,0), taking B to B'. What are the corrdinates of C'?

Accepted Answer

(2,-2)

Answer

(1,-1)

Answer

(-2,2)

Answer

(4,0)

Question 5

Quadrilateral ABCD is dialted with center (0,0), taking B to B'. What are the corrdinates of D'?

Accepted Answer

(-6,-4)

Answer

(-2,-3)

Answer

(-4,-6)

Answer

(0,-1)

Question 6

Triangle A'B'C' is the image of triangle ABC after a dilation with center (0,0) and a scale factor of 2. Select all coordinates that are vertices of triangle A'B'C'.

Accepted Answer

(-4,4)

Accepted Answer

(8,-4)

Accepted Answer

(-4,-4)

Answer

(8,-2)

Answer

(-2,2)

Question 7

Triangle A'B'C' is the image of triangle ABC after a dilation with center (0,0) and a scale factor of 1/2. Select all coordinates that are vertices of triangle A'B'C'.

Accepted Answer

(2,-1)

Accepted Answer

(-1,-1)

Accepted Answer

(-1,1)

Answer

(2,-2)

Answer

(-2,1)

Question 8

Triangle ABC is a right triangle, and the measure of angle A is 28 degrees. What are the measures of the other two angles?

Accepted Answer

90

Accepted Answer

62

Answer

cannot be determined from the information given

Answer

152

Question 9

Triangle DEF is a dilation of triangle ABC with scale factor 2. In triangle ABC, the largest angle measures 82 degrees. What is the largest angle measures in triangle DEF?

Accepted Answer

82

Answer

41

Answer

123

Answer

164

Question 10

Jada claims that B'C'D' is a dialtion of BCD using A as the center of dilation. What are some ways you can convince Jada that her claim is not true?

Accepted Answer

The angle BCD is larger than the angle B'C'D'

Answer

You can't because Jada is right.

Answer

The figure doesn't touch point A.

Answer

Segment B'C' is longer than segment BC

Question 11

Select each pair that are the angles of a pair of similar triangles.

Accepted Answer

Triangle C and Triangle D

Accepted Answer

Triangle A and Triangle B

Answer

Triangle E and Triangle F

Answer

Triangle G and Triangle H

Question 12

These two triangles are similar. What is the measure of side a?

Accepted Answer

6

Answer

21

Answer

8

Answer

Unable to determine

Question 13

These two triangles are similar. What is the measure of side b?

Accepted Answer

22.5

Answer

18

Answer

20

Answer

Unable to determine

Question 14

The two triangles shown are similar. What is the value of d/c?

Accepted Answer

5/6

Answer

unable to determine

Answer

d/c

Answer

7/9

Question 15

The diagram shows two nested triangles that share a vertex. Find the center of dilation that moves the larger triangle to the smaller triangle.

Accepted Answer

(-1,1)

Answer

(0,0)

Answer

(1,1)

Answer

Cannot be determined.

Question 16

The diagram shows two nested triangles that share a vertex. Find the scale factor that moves the larger triangle to the smaller triangle.

Accepted Answer

1/5

Answer

1/6

Answer

5

Answer

Cannot be determined.

Question 17

Of the three lines on the graph, which line has a slope of 1?

Accepted Answer

blue

Answer

orage

Answer

black

Answer

none

Question 18

Of the three lines on the graph, which line has a slope of 1/5?

Accepted Answer

black

Answer

blue

Answer

orage

Answer

none

Question 19

Of the three lines on the graph, which line has a slope of 1/2?

Accepted Answer

none

Answer

blue

Answer

orage

Answer

black

Question 20

Of the three lines on the graph, which line has a slope of 2?

Accepted Answer

orage

Answer

blue

Answer

black

Answer

none

Question 21

What is the slope of the line through the two points (1,1) and (7,5)? If you need help graph these two points and look at their slope triangle.

Accepted Answer

2/3

Answer

3/2

Answer

5/7

Answer

0

Question 22

What is the slope of the line through the two points (1,1) and (5,7)? If you need help graph these two points and look at their slope triangle.

Accepted Answer

3/2

Answer

2/3

Answer

5/7

Answer

0

Question 23

What is the slope of the line through the two points (2,5) and (-1,-2)? If you need help graph these two points and look at their slope triangle.

Accepted Answer

7/3

Answer

-7/3

Answer

3/7

Answer

-3/7

Question 24

What is the slope of the line through the two points (2,5) and (-7,-4)? If you need help graph these two points and look at their slope triangle.

Accepted Answer

1

Answer

-1

Answer

0

Answer

Not possible

Question 25

What are the coordinates of point B?

Accepted Answer

(4,0)

Answer

(0,0)

Answer

(0,4)

Answer

(8,10)

Question 26

What are the coordinates of point D?

Accepted Answer

(8,10)

Answer

(0,0)

Answer

(4,0)

Answer

(10,8)

Question 27

Is the point (16,20) on the line?

Accepted Answer

Yes

Answer

No

Answer

I don't know

Question 28

Is the point (20,24) on the line?

Accepted Answer

No

Answer

Yes

Answer

I don't know

Question 29

Is the point (80,100) on the line?

Accepted Answer

Yes

Answer

No

Answer

I don't know

Question 30

Select all the points that are on the line through (0,5) and (2,8).

Accepted Answer

(6,14)

Accepted Answer

(4,11)

Accepted Answer

(30,50)

Answer

(5,10)

Answer

(40,60)

Unit 2 Test Review 8th grade math

46 questions

Rectangle A measures 12cm by 3 cm. Rectangle B is a scaled copy of Rectangle A. Select ALL measurements that could be Rectangle B.

When we are talking about scale figures the ratio has to be the same. Since 12/3 = 4 then any scale drawing would have the same ratio.

Which of these sets of angle measures could be the three angles in a triangle?

The sum of the angles in a triangle has to be 180 degrees

In the picture lines AB and CD are parallel. Find the measure of angleBCD.

Since the lines are parallel we know that alternate interior angles are congruent.

In the picture lines AB and CD are parallel. Find the measure of angleECF.

Since the lines are parallel we know that alternate interior angles are congruent. Then we also know that vertical angles are congruent.

In the picture lines AB and CD are parallel. Find the measure of angleDCF.

Since the lines are parallel we know that alternate interior angles are congruent. Then we also know that a linear pair (two angles that make a straight line) have to add up to 180 degrees.

Segment AB meausres 3cm. Point O is the center of dilation. How long is the image of AB after a dilation with scale factor 5?

When dilating by a scale factor then we know that all segment measures are multiplied by the scale factor.

Segment AB meausres 3cm. Point O is the center of dilation. How long is the image of AB after a dilation with scale factor 3.7?

When dilating by a scale factor then we know that all segment measures are multiplied by the scale factor.

Segment AB meausres 3cm. Point O is the center of dilation. How long is the image of AB after a dilation with scale factor 1/5?

When dilating by a scale factor then we know that all segment measures are multiplied by the scale factor.

Segment AB meausres 3cm. Point O is the center of dilation. How long is the image of AB after a dilation with scale factor s?

When dilating by a scale factor then we know that all segment measures are multiplied by the scale factor.

Triangle ABC is a scaled copy of triangle DEF. Side AB measures 12 cm and is the longest side of ABC. Side DE measures 8 cm and is the longest side of DEF. What is the scale factor to go from triangle ABC to triangle DEF?

When determining scale factor always do image divided by preimage for corresponding sides.

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