The measures are as follows
SV = 9
SY = 14
YW= 8.66
YX = 5.2
How to find the measures
The measure of SV = ST / 2
SV = 18/2
SV = 9
SY = TY = UY = 14 (circumcenter property)
Then, SY = 14
Find YW using Pythagorean theorem
YW² = YT² - WT²
YW² = 14² - 11² = 75
YW = √75
YW= 8.66
Find YX using Pythagorean theorem
YX² = SY² - SX²
YX² = 14² - 13² = 27
YX = √27
YX = 5.2