Posted by Anonymous on Monday, January 16, 2012 at 6:09pm.
A triangle has an area of 20 inches squared. Every dimension of the triangle is multiplied by a scale factor, and the new triangle has an area of 180 inches squared. What is the scale factor.

algebra  Steve, Tuesday, January 17, 2012 at 10:20am
if a rectangle (or any 2dimensional figure) is scaled by a factor of n, then
length l becomes nl
width w becomes nw
area lw becomes (nl)(nw) = n^2(lw) = n^2 times the old area
For your rectangle, the new area is 9 times the old area, so the scale factor is √9 = 3

algebra 1  Shanelle, Sunday, October 6, 2013 at 5:31pm
a triangle has an area of 20 inches squared. every dimension of the triangle is multiplied by a scale factor, and the new triangle has an area of 180 inches squared. what was the scale factor?

algebra  gfdgf, Friday, October 9, 2015 at 11:50pm
9
Answer This Question
Related Questions
 Algebra 1  a triangle has an area of 20 inches squared. every dimension of the ...
 Math  Triangle A has an area of 19,00cm squared and similar triangle B has an ...
 geometry  a rectangle has an area of 48 inches squared every dimention of the ...
 algebra, HELP!  9. The sides of a rectangle are increased by a scale factor of ...
 Algebra  A right triangle has an area of 24 ft^2 the demesions of the triangle ...
 PreAlgebra  A triangle is enlarged by a scale factor of 10/3. a) If the ...
 MATH  1. The sides of a square are increased by a scale factor of 6. The ...
 algebra  A triangle has side lengths of 5 inches, 12 inches, and 15 inches. ...
 math  A right triangle has an area of 13 m2. The dimensions of the triangle are...
 math Ms. Sue  A right triangle has an area of 13 m2. The dimensions of the ...
More Related Questions