Scaled Copies

Which figures are scaled copies of the original A?

• Figures 2 and 4

• Figures 1 and 3

• Figures 1 and 2

• Figures 3 and 4

Answer explanation

Figure 2 side lengths got 2 times bigger. The scale factor is 2.

Figure 4 side lengths got 1/2 the size. The scale factor is 1/2.

Tags

CCSS.8.G.A.3

On a blueprint, the scale is 1 in = 10 ft.  If a wall is drawn as 3.3 inches on the blueprint, what is the actual length?

• 3 feet

• 3 inches

• 30 inches

• 33 feet

Answer explanation

1 inch x 3.3 = 3.3 inches

10 feet x 3.3 = 33 feet

Tags

CCSS.7.G.A.1

On a map, the scale is 1 in. = 200 ft. The actual distance of a road is 2,400 ft. What is the size on the map?

• 12 inches

• 6 inches

• 480,000 feet

• 12 feet

Tags

CCSS.7.G.A.1

What is the length of "Side X" if figure B is a scaled copy of figure A? 

• 4

• 5

• 3

• 2.5

Answer explanation

The scale factor is 2 because 2.5 x 2 = 5. This means all side lengths need to be multiplied by 2 because they are getting 2 times longer.

1.5 x 2 = 3

Tags

CCSS.7.G.A.1

What is the measurement of "Angle X" if figure B is a scaled copy of figure A? 

Answer explanation

To create a scaled copy measurement angles remain the same. Think back to when we proved our answers with tracing corresponding angles and seeing the lines matched.

Tags

CCSS.7.G.A.1

What is the scale factor if Figure B is a scaled copy of Figure A?

• 2

Answer explanation

All side lengths are getting 2 times longer.

2.5 x 2 = 5

Since we multiplied by 2, 2 is our scale factor.

Tags

CCSS.7.G.A.1

• Larger

• Smaller

• The Same Size

Tags

CCSS.7.G.A.1

• Larger

• Smaller

• The Same Size

Answer explanation

Scale factor of 4 means you multiply all side lengths by 4. If the lengths are getting longer, the shape is getting larger.

Tags

CCSS.8.G.A.3

• Larger

• Smaller

• The Same Size

Answer explanation

Scale factor of 1 means you multiply all side lengths by 1. Anything multiplied by 1 is itself, so the lengths are not changing. This means the shape is going to be the same size.

Tags

CCSS.8.G.A.3

A scale drawing of a park is 15 cm wide. The scale on the map is 1 cm = 4 yds. How wide is the actual park?

• 60 yards

• 3.75 yards

• 60 cm

• 240 cm

Answer explanation

1 cm x 15 = 15 cm

4 yards x 15 = 60 yards

Tags

CCSS.7.G.A.1