Answer:
P = 31.6
Step-by-step explanation:
distance of AB and CD is 5 units each (used Distance Formula)
distance of BC and AD is [tex]\sqrt{117}[/tex] units each (used Distance Formula); which is
6[tex]\sqrt{13}[/tex]
2(6[tex]\sqrt{13}[/tex]) + 10 = 31.6
