Please anseee all these questions and give me the explanation as well Thanks

1. An equilateral triangle has sides of length 16. Find the length of an altitude. 2. Find the perimeter of a square with a diagonal of length 12. 3. An equilateral triangle has an altitude of length 53 . Find the perimeter. 4. A square has a perimeter of 12 centimeters. Find the length of the diagonal of the square. _ 5. A rectangle has one side 5 inches and a diagonal of 15 inches. Find the perimeter of the anole