Respuesta :

wegnerkolmp2741o

Answer:

54

Step-by-step explanation:

This is an isosceles triangle since the base angles are the same.  That means the unlabeled side must be 12

P = s1 + s2+s3  where s is the side

P = 12+12+30

P = 54

musiclover10045

The two bottom angles are the same which means the two sides are also the same..

Perimeter = 12 + 12 + 30 = 54

Answer: A.54