Thursday 9/2--7th

Thursday 9/2--7th

by Katie Butler

Multiple Choice

There are 4 girls in a class of 16 students.  What percent of the class is boys? 

• 12%

• 75%

• 50%

• 90%

Multiple Choice

What is a scale drawing?

• A drawing that shows a real object enlarged or reduced

• A drawing of the weight of an object

• A life size drawing of an object

• A drawing that shows all the sides of a building

Multiple Choice

What is the scale factor from the small shape to the big shape?

• 1/2
• 7/3
• 2
• 10/3

notes: copy in your notebook

Multiple Choice

If you want to find the scale factor from one figure to another, which formula should you use?

• old/ new

• drawing / actual

• Actual / model

Multiple Choice

Triangle PQR is shown. Its original lengths are multiplied by 2.5. What are the new side lengths of P’Q’R’?

• PQ: 20, RQ: 42.5, RP: 37.5

• PQ: 16, RQ: 34, RP: 30

• PQ:4, RQ:8.5, RP: 7.5

Multiple Choice

An area rug is 9 feet wide. In a photograph, the image of the rug is 3 inches wide. What was the scale factor used?

• $$\frac{1}{3}$$

• $$\frac{1}{9}$$

• 3

Multiple Choice

The Waccamaw Bridge is 60 meters long. The length of a model of the bridge is 15 cm long. What is the scale of the model?

• $$\frac{1}{4}$$

• $$\frac{1}{15}$$

• $$\frac{1}{60}$$

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

• 3

• 4