Given BRAIN~POWEQ, find the value of x, y and z.

http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-WA10/b/assessments/S-SimilarPolygonsQuiz/Geometry_6.3_Final_Quiz_8q2.gif

How on earth do I do this?? I am so confused!!!

Question

Given BRAIN~POWEQ, find the value of x, y and z.

http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-WA10/b/assessments/S-SimilarPolygonsQuiz/Geometry_6.3_Final_Quiz_8q2.gif

How on earth do I do this?? I am so confused!!!

anonymous · Answer

If they say both are similar then
$$\frac{12.5}{2x+1}=\frac{7.5}{3}=\frac{y+5}{4.5}=\frac{10}{4}=\frac{17.5}{14z}$$

anonymous · Answer

x=2
y=6.25
z=0.5

anonymous · Answer

Ohh I see. So all I am supposed to do is take the measures of the proportional sides and make proportions out of them and then cross multiply right?