Medal!!! Denise calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it?

Question

anonymous · Answer

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anonymous · Answer

d because its a right triangle

anonymous · Answer

can you please help with mine......
Simple Algebra 1!!!!!! please help :)

The prices of 21 top-rated 28-inch direct view television sets are as followed 
$360   $470   $570   $660   $740   $800   $870
 380     520      580     690     750     840     880
 430     550      620     740     790     840     880
determine Q2  Q1 and Q3

solomonzelman · Answer

Pythagorean identity $\large\color{blue}{ a^2+b^2=c^2  }$  only applies to right triangles.