Proportions & Scale Factors

Presentation

•

Mathematics

•

10th Grade

•

Medium

•

CCSS

7.RP.A.2, 7.G.A.1, 6.RP.A.2

+14

Standards-aligned

William Katumba

Used 1+ times

FREE Resource

3 Slides • 37 Questions

Proportions
&
Objects at scale

Multiple Choice

Write the ratio as a fraction in simplest form.
15 girls to 6 boys

5 to 2

5/3

3 to 5

5/2

Multiple Choice

Do the ratios form a proportion?

Yes, they form a proportion.

No, they do not form a proportion.

Multiple Choice

Solve the proportion.

n=6

n=24

n=7

n=8

Multiple Choice

What is the ratio of red apples to green apples

7 apples to 3 green

4 red apples to 7 apples

4 red apples to 3 green apples

3 green apples to 4 red apples

Multiple Choice

Josh bought a pizza with eight slices of pizza for $12. What is the cost of a slice of pizza?

$12

$1.50

Multiple Choice

It takes one pizza to feed 3 people. If you invite 36 people, how many pizzas will you need?

Multiple Choice

The waiting time to ride a roller coaster is 20 minutes when 150 people are in line. How long is the waiting time when 1,200 people are in line?

120 min

140 min

160 min

180 min

Multiple Choice

Mary had saved $17.50 in the past 3 weeks. At this rate, how much will she save in 15 weeks?

67.50

40.00

87.50

nothing

Multiple Choice

A 12-ounce bottle of shampoo lasts Enrique 16 weeks. How long would you expect an 18-ounce bottle of the same brand to last him?

24 Weeks

24-ounce bottle

10.6 Weeks

10.6-ounce bottle

Multiple Choice

About 13 out of 20 homes have a personal computer. On a street with 60 homes, how many computers would you expect to have?

39 Computers

4.3 Homes

39 Homes

4.3 Computers

Multiple Choice

A bird flies 35 meters in 10 seconds. If it keeps flying at the same rate, how long will it take it to fly 14 more meters?

x = 49 seconds

x = 4 meters

x = 49 meters

x = 4 seconds

Multiple Choice

Mary had saved $17.50 in the past 3 weeks. At this rate, how much will she save in 15 weeks?

67.50

40.00

87.50

nothing

Multiple Choice

What is the formula for scale factor?

$\frac{new}{old}$

$\frac{old}{new}$

Multiple Choice

If the scale factor is less than one, the new figure will be

an enlargement

a reduction

a scale factor

bigger

Multiple Choice

If the scale factor is greater than one, the new figure will be

a reduction

an enlargement

a scale

not proportional

Multiple Choice

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

1/2

7/3

2/1

10/3

Multiple Choice

What is the scale factor from the large triangle to the small triangle?

1/2

2/3

3/4

Multiple Choice

Solve for X.

2 ft

3 ft

4 ft

6 ft

Multiple Choice

A model is built to a scale of 1 ft ∶ 10 ft. If a model airplane is 3 feet long, how long is the actual plane?

13 ft

30 ft

3 ⅓

Multiple Choice

The two rectangles are scale drawings. What is the measurement of x?

1.25

Multiple Choice

What is the ratio of the side lengths of XYZ:ABC?

1.25

1.5

2.5

Multiple Choice

How long is side x?

1.5

2/3

Math Response

What's the scale factor (the # you MULTIPLY by) to go from Quad EFGH to Quad JKLM?

Type answer here

Deg^°

Rad

Math Response

What's the scale factor (the # you MULTIPLY by) to go from Polygon N to Polyton P?

Type answer here

Deg^°

Rad

Multiple Choice

The scale drawing of the car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?

12 feet

16 feet

10 feet

4 feet

Multiple Choice

In a scale drawing of his room, Colin used each inch to represent 10 feet. What is the scale factor from his drawing to his actual room?

1/10

Multiple Choice

Picture: 3 cm

Actual: 12 ft.

What is the scale factor?

$36$

$4$

$\frac{1}{4}$

$15$

Multiple Choice

What is the scale factor from the smaller quadrilateral to the larger?

scale factor = 4

scale factor = 10

scale factor = 3

scale factor = 2

Multiple Choice

What is the scale factor from ABCD to MNOP?

2/3

3/2

Multiple Choice

What is the scale factor from the small fry to the large fry?

1/3

Multiple Choice

Megan drew a scale drawing of a house and its lot. The scale she used was 1 inch = 2 feet. The backyard is 78 feet long in real life. How long is the yard in the drawing?
____ = ____

39 inches

156 inches

38 inches

157 inches

Multiple Choice

Find side length X.

2.4

Multiple Choice

A map has a scale of 1 cm=5km. On the map, two cities are 3 cm apart. What is the actual distance between these cities?

1.7 km

5 km

15 km

17 km

Multiple Choice

Jamie made a scale drawing of his apartment building. The building is 300 ft tall. He wants his scale to be 1 inch : 10 ft. How tall should his building be in his scale drawing?

25 inches

60 inches

1/30 inch

30 inches

Multiple Choice

If the original is 12 units and the scale factor is 1/4 what is the size of the scale drawing?

300

4.8

Multiple Choice

On a map, Memphis, Tennessee, and Jackson, Mississippi, are 5 inches apart. The distance between the cities is actually 210 miles.

What scale was used to create the map?

42 inches = 1 mile

1 inch = 42 miles

40 inches = 1 mile

1 inch = 40 miles

Multiple Choice

Megan drew a scale drawing of a house and its lot. The scale she used was 1 inch = 2 feet. The backyard is 78 feet long in real life. How long is the yard in the drawing?
____ = ____

39 inches

156 inches

38 inches

157 inches

Proportions
&
Objects at scale

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