Question

What is the answer for this question?

Answer 1

Triangle RTS is a right triangle and QTP is also a right triangle
look for the little square in the corners of a right triangle

Answer 2

rhombus, all sides are equal so 
PS = RS = 30
TS = QT = 14

c^2 = a^2 + b^2
b^2 = c^2 - a^2

 c^2 - a^2 = 30^2 - 14^2
= 900 - 196
= 704

so PT = √704 = 26.5

answer
C) 26.5