SME
Grade 7 Math
Scale drawings
The main lesson, then each kind of problem it solves.
Scale drawings
Main lesson
Map distances in miles
Use this for “On a map, 1 inch represents 25 miles. Two towns are 3.5 inches apart. How far apart are they?”
Map distances in kilometers
Use this for “On a map, 1 cm represents 5 km. How far is a 7.2 cm route?”
Scaled copies on a grid
Use this for “A 4 by 3 picture is enlarged to 12 wide. How tall is it?”
Scale factor and area
Use this for “A triangle with base 4 and height 3 is copied at scale factor 2. What is the copy’s area?”
Scaled copy or not?
Use this for “Which figure is a scaled copy of the original?”
The same scale, said another way
Use this for “Which scale is the same as 1 cm to 50 m?”