It is a rectangle
The shaded thing
Must click thanks and mark brainliest
Answer:
Part 1) 
Part 2) 
Step-by-step explanation:
Part 1)
we know that
The perimeter of triangle is equal to the sum of its length sides
so

Part 2)
we know that
The area of triangle is given by the formula

we have

substitute

That would be 9 posts per side. Hope this answers your question(s)!
Answer:
where is the work
Step-by-step explanation:
fdcaccge so tsf