Setting Up Proportions

What is a scale drawing?

• board of scales

• Bigger or smaller proportion of an actual object.

• drawing of all types of scale 

• to show how to draw

Tags

CCSS.7.RP.A.2C

Jane created a scale drawing of her school. If the drawing, the width of her school is 25 inches while the actual width of her school is 230 feet. What is the scale Jane used for her drawing?

• 9in: 2 ft

• 2in: 9ft

• 46in: 5ft

• 5in: 46ft

Tags

CCSS.7.RP.A.2C

After setting up a proportion, what is the first step you need to do to solve for the variable?

• divide by the coefficient

• cross multiply

• multiply numerators

• multiply denominators

Tags

CCSS.7.RP.A.3

If a 3ft tall car cats a 5ft long shadow then how long is the shadow that a 9ft tall adult elephant casts? Which of the following is how the proportion should be set up?

Tags

CCSS.7.RP.A.3

If a 14ft tall flagpole casts a 3ft shadow then how tall is an adult giraffe that casts a 9ft shadow?

• 16ft

• 22ft

• 32ft

• 42ft

Tags

CCSS.7.RP.A.3

Find the distance between Mount Pleasant and Madison on a map with a scale of 1cm: 14km if they are actually 98km apart.

• 0.14cm

• 2cm

• 5cm

• 7cm

Tags

CCSS.7.RP.A.2C

What is the value of x?

• 1.8

• 5.4

• 12

• 21.6

Tags

CCSS.7.G.A.1

What is the value of x?

• 5

• 15

• 25

Tags

CCSS.7.G.A.1

This scale drawing shows a parking lot. What is the length of the longer side of the actual lot? How would you set up the proportion to solve this problem?

Tags

CCSS.7.RP.A.2C

This scale drawing shows a parking lot. What is the length of the longer side of the actual lot?

• 63m

•  235m

•  315m

•  630m

Tags

CCSS.7.G.A.1