Vocabulary
This is a representation of an object that has been made smaller.
Reduction
If a length of 2 cm was enlarged by a scale factor of 2, then what is the new length?
4cm
Ivan drew a scale drawing of his backyard at a scale of 1in : 3ft. If Ivan's deck is 48 feet wide in real life, what is the width of the deck in the drawing?
16 in
Trent measured an Italian restaurant and made a scale drawing with a scale of 1mm : 7 m. If the kitchen is 4mm in the drawing, how long is the actual kitchen?
28 meters
David made a scale drawing of a house. In real life, the garage is 10 meters long. It is 2 millimeters long in the drawing.
What is the scale of the drawing, 1mm : _________
5 meters
The ratio of the length in a drawing or model to the length on an actual (real life) object
Scale
Two legs of a Right Triangle A are 3 & 4
Two legs of Right Triangle B are 9 & 12
What is the Scale Factor from Triangle A to Triangle B?
3
Mitch was looking at a blueprint of West Lake that has a scale of 1 m : 9 m. If the actual width of the building is 90 meters, what is the width of the school in the drawing?
10m
Phillip drew a to scale floor plan of his house. If the scale he used was 1in : 4ft, and he drew the driveway 3 inches wide, how wide is the driveway in real life?
12 feet
Anne made a scale drawing of a house and its lot. The backyard is 5 inches long in the drawing. The actual yard is 50 feet long.
What scale did Anne use for the drawing?
1in : _____________
10 feet
This is a reduced or enlarged representation of an object, usually accompanied by a comparison of sizes.
Model or a Scale Drawing
Mr. A's Drawing of his house is drawn at a scale of 1/2. One of the dimension of the real house is 21m. What is the equivalent length of the dimension in a scale drawing?
10.5m
Duncan measured a pool and made a scale drawing. The scale of the drawing has a scale factor of 1metre:3 feet. If the actual length of the pool table is 15 meter, how long is the pool in the drawing?
5 feet
Clayton drew a scale drawing of a neighborhood park at a scale of 5 centimeters : 9 meters. In the drawing, the volleyball court is 10 centimeters long. What is the length of the actual volleyball court?
18 meters
Tommy measured a county park and made a scale drawing. The picnic area, which is 86 yards wide in real life, is 43 inches wide in the drawing.
What scale did Tommy use? 1in : ____________
2 yards
A representation of an object that is larger than the original
Enlargement
In Science class you draw a cell to the scale of
48 mm = .04mm
Find the scale factor.
1,200
A Flagpole is 30 ft tall. Using the scale 3 in : 5 ft, draw a flagpole and label it's height.
Flagpole should be labeled 18 inches tall
A rectangle has a length of 4m and a width of 5m. It was enlarged by a scale factor of 1.5. What will be the area of the enlarged shape?
45 meter squared
Explain what will happen to the dimensions if the scale factor is greater than 1.
Explain what will happen to the the dimension if the scale factor is less than 1.
SF > 1 The object will be enlarged.
SF < 1 The object will be reduced.