MA19.7.17

Mathematics (2019) Grade(s): 7

Students know:

how to calculate actual measures such as area and perimeter from a scale drawing.
Scale factor impacts the length of line segments, but it does not change the angle measurements.
There is a proportional relationship between the corresponding sides of similar figures.
A proportion can be set up using the appropriate corresponding side lengths of two similar figures.
If a side length is unknown, a proportion can be solved to determine the measure of it.

Students are able to:

find missing lengths on a scale drawing.
Use scale factors to compute actual lengths, perimeters, and areas in scale drawings.
Use a scale factor to reproduce a scale drawing at a different scale.