Given kite RSTU. Please I need help ASAP.

Given Kite RSTU Please I Need Help ASAP class=

Answer :

The angle is 64 because if srt is 26 then urt is also 26 because the kite is symmetrical. In a symmetrical kite the intersecting lines form right angles so we can say that urt +rus=90
So 26+ rus =90
Rus=64