Answer:
a=18units
x=99°
y=108°
Step-by-step explanation:
Perimeter=sum of lengths around the kite.
Given that two sides each are congruent:
P=12+12+a+a
60=24+2a
60-24=2a
36=2a
a=36/2=18
x=99°
y+99+99+54=360°(sum of interior angles of a quadrilateral)
y+252=360
y=360-252
y=108°
