Answer:
YXN = 90
YN = 5
Step-by-step explanation:
LMN is a right angled triangle, right angled at M (Given)
Using pythagoras Theorem,
LN = 10 (LN is the perpendicular)
Triangle XYN is a right angled triangle congruent to LMN. Therefore,
Angle YXN is 90.
XN = 3 as X is the midpoint.
YN = 5 as Y is the midpoint of LN.