Geometry Dimensional Change in Area
Presentation
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Medium
Standards-aligned
C. Swain
Used 21+ times
FREE Resource
5 Slides • 4 Questions
1
By Mrs. Swain - Clear Lake High School
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Dimensional Change
What is the area of this Rectangle?
3
Dimensional Change
What if the dimensions were doubled?
4
So what is the rule?
The area's change is the dimensional's changed squared.
Another way to say that...
Area factor = Similiarity factor X similiarity factor
or...
Multiply the area by the similarity factor and then again by similarity factor.
5
What it looks like
If the dimensions were doubled... then the area would be doubled X doubled
Area would be multiplied by 2x2 = 4
6
Multiple Choice
A polygon's dimensions change by 2/5, what happens to the area?
The area changes by 2/5
The area changes by 4/25
The area changes by 4/10
The area changes by 4/5
The area changes by 2/10
7
Multiple Choice
If there was a polygon and the dimensions were multiplied by 4, what would happen to the area?
area multiplied by 4
area multiplied by 8
area multiplied by 16
area multiplied by 32
I still don't know
8
Multiple Choice
A polygon's dimensions change by 5/3, what happens to the area?
The area changes by 5/3
The area changes by 10/9
The area changes by 25/3
The area changes by 10/6
The area changes by 25/9
9
Multiple Choice
If there was a polygon and the dimensions were multiplied by 7, what would happen to the area?
area multiplied by 7
area multiplied by 17
area multiplied by 49
area multiplied by 98
I still don't know
By Mrs. Swain - Clear Lake High School
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