What is a scale factor?
Scale Factor

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•
Mathematics
•
7th - 8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A scale factor is a number that scales, or multiplies, some quantity. It is used to determine the ratio of the dimensions of a scale drawing to the actual dimensions.
2.
FLASHCARD QUESTION
Front
How do you calculate the unit rate?
Back
To calculate the unit rate, divide the total amount by the number of units. For example, if a company pays $450 for 4 employees working 15 hours each, the unit rate is $450 ÷ (4 employees × 15 hours) = $7.50 per hour.
3.
FLASHCARD QUESTION
Front
If a scale drawing shows a car length of 3 cm and the scale is 1 cm:4 ft, what is the actual length of the car?
Back
The actual length of the car is 3 cm × 4 ft/cm = 12 feet.
4.
FLASHCARD QUESTION
Front
What is the formula to find the actual distance using a map scale?
Back
Actual Distance = Map Distance × (Scale Factor). For example, if the map distance is 4.125 inches and the scale is 2 inches = 40 miles, then Actual Distance = 4.125 inches × (40 miles / 2 inches) = 82.5 miles.
5.
FLASHCARD QUESTION
Front
What does a scale of 1.5 inches = 2 feet mean in a blueprint?
Back
It means that every 1.5 inches on the blueprint represents 2 feet in real life.
6.
FLASHCARD QUESTION
Front
How do you find the length of a room in a blueprint if you know the actual length?
Back
To find the length on the blueprint, use the scale. For example, if the actual length is 17 feet and the scale is 1.5 inches = 2 feet, then Length on Blueprint = (17 feet × 1.5 inches) / 2 feet = 12.75 inches.
7.
FLASHCARD QUESTION
Front
What is the scale factor from a smaller triangle to a larger triangle if the sides are in the ratio 1:2?
Back
The scale factor is 2.
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