Homework Help: Geometry

Posted by Tyler on Wednesday, April 27, 2011 at 2:21pm.

The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle?

Geometry - Reiny, Wednesday, April 27, 2011 at 3:10pm
since perimiter is a linear measurement, the ratio of the perimeter equals the ratio of the sides

if x is the larger perimeter,
x/12 = 3/4
4x = 36
x = 9

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