Question 1165310
hypotenuse is 5 in the first triangle and 10 in the second.
sin theta=4/5=0.8, and the angle is 53.1 deg

T is 6-8-10 apparently, and not 6-7-10
The sin of p is 8/10=0.8.

These are both similar triangles with one twice as big as the other in all sides with similar angles. 
There are multiples of right triangles.