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1. Triangle MNP is mapped to Triangle M'N'P' using each of the given rules. For which rules is Triangle MNP congruent to Triangle M'N'P'?

Select each correct answer.

(x,y) ->(x,-y)

(x,y)->(x-1,y+6)

(x,y)->(1.6x,1.6y)

(x,y)->(1/6x,1/6y)

(x,y)->(-y,x)

 

2. The coordinates of the verticies of a polygon are (-4,2), (2,2), (2,-1), (-2,-3), and (-5,-2). What is the perimeter of the polygon? Round each length to the nearest tenth of a unit.

Guest Apr 17, 2017
 #1
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1. 

(x,y) ->(x,-y)

(x,y)->(x-1,y+6)

(x,y)->(-y,x)

 

2.  (-4,2), (2,2), (2,-1), (-2,-3), and (-5,-2).

 

Use the distance formula to  find the distance between two consecutive points...for example....

The distance between the last two points is

 

sqrt [ ( -2 + 5)^2 + (-2 + 3)^2 ]   =  sqrt  3^2 + 1^2]   =  sqrt[10]  ≈ 3.2

 

Here's a pic with the distances......you can figure the perimeter

 

 

cool cool cool

CPhill  Apr 17, 2017

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