Please help me with this..(right triangle{geometry})

1. A rectangle has a diagonal of 2 and length of √3. Find its width.

2. Find the length of a side of a square with a diagonal of lenth 12.

3. The perimeter of a rhombus is 40cm, and one diagonal is 12cm long. How

long is the other diagonal?

3. A diagonal of a square has lenth 8. What is the perimeter of the square?

4. Find the altitude of an equilateral triangle if each side is 10 units long.

*Please include the solutions....^^;;(Sweating)(Sadsmile)