Two similar polygons have a side - length ratio of 9 : 14. If the perimeter of the larger polygon is 168 units, what is the perimeter of the smaller polygon?
Options
A
108 units
B
112 units
C
126 units
D
132 units
Answer & Analysis
Answer
A
Analysis
Question Analysis
The goal is to find the perimeter of the smaller polygon using the side-length ratio (9:14) and the perimeter of the larger polygon (168 units). The key is applying the property that the ratio of perimeters of similar polygons equals their side-length ratio.
Key Concept Explanation
For similar polygons, if the side-length ratio is , the perimeter ratio is also . Thus, .
Step-by-Step Solution
1. Set up the proportion:
Let = perimeter of the smaller polygon.
The ratio of side lengths is , so:
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