This problem has missing information, so I've provided my own diagram below.
By Alternate Interior Angles:
Angles ∠6 and 48 degrees are supplementary:
Internal angles of every triangle add up to 180 degrees:
Finally:
Answer:
13y+39=13y
13y=13y+39
13y-13y=39
y=39
25 cm
Step-by-step explanation:
a^2 + b^2 = c^2
7^2 + 24^2 = c^2
49 + 576 = c^2
c^2 = 625
c = 25
Answer: 25 cm
RS = 15/ tan57° = 9.7
RT = 15/sin57° = 17.9