How do you write 100 as a power of 10

Which expression gives the area of the triangle shown below

Ihonestly have no clue if it's each or none.

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