Need help please, assignment due soon

How do you find the area of this triangle.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick