Quant Geomentry

GRE Quant Problem Solving
1

I have a doubt regarding the question that I have attached with this.
My approach was I joined Q and T, and calculated the sum of QR,RS, and ST ,which was 11.
With this we can say that QT is less than 11.
Then, I got (11-3)<PT<(11+3)
This eliminated options b,c,d and e and unfortunately the answer you gave with your analysis was C.
I dunno where I went wrong .
So I hope you can help me.
Video:Quant Misc - Difficult Geometry - GregMat .

Question
Question710×357 19.6 KB

Time around 25 mins.

2

The sum of two sides greater than third is a property of triangles . So, you need to construct a triangle to apply this property.

3

Yeah, but can I know what’s wrong with my approach?

4

image

QRST it a quadrilateral hence, we can’t use the triangle property

5

Gotcha thanks