9.
The sides of a rectangle are increased by a scale factor of 4. The perimeter of the smaller rectangle is 20 cm. What is the perimeter of the larger rectangle? (1 point)
320 cm
80 cm
120 cm
60 cm
10.
A right triangle has an area of 13 m2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the new triangle? (1 point)
39 m2
169 m2
117 m2
142 m2
12.
The width of a picture is 20 cm. Using a color copier, you reduce the width of the picture to 5 cm. What is the scale factor of the dilation? (1 point)
5
1 over 5
4
1 over 4
13.
On a given blueprint, 1 inch = 16 feet. If the dimensions of the bedroom on the blueprint are 0.75 inches × 1.5 inches, what are its actual measurements? (1 point)
16 ft × 32 ft
12 ft × 24 ft
16 ft × 24 ft
12 ft × 32 ft
14.
Using the same scale factor, what are the blueprint dimensions for a room that is 20 feet x 28 feet? (1 point)
1.5 in. × 2.5 in.
1.25 in. × 2.25 in.
1.25 in. × 1.75 in.
1.5 in. × 1.75 in.
15.
The scale of a map is 1 in.:75 mi. How many actual miles does 0.85 inches represent? (1 point)
88.2 miles
63.75 miles
95.6 miles
4,781.3 miles
20 answers
c
d
a
c
1.3:1
2.p=5.25
3.49 inches
4.37.21
5. 6.95 gallons/month
6.$144.04
7.30 in.
8.28 ft
9.112 ft
10. 142 m2
11. scale factor 3;enlargement
12. 1/2
13. 24ft times 21 ft
14. 2.4 in. times 3.6 in.
15.63.75
16.17 feet
Have a great day:)
8 answers