Question

PLS HELP THIS IS DUE TOMORROW AND I'M SO DUMB

Answer 1

To find a perimeter of any shape you just need to add together all the sides of the shape. 
For example: /_\ (pretend this is a triangle)
If each side of the triangle is 5 cm, then 5+5+5=15 cm (or you can do 5*3=15 cm)
The perimeter of the triangle is 15 cm. 

Hope I helped!(: