What type of special right triangle can an isosceles triangle be?

How do you find the area of this triangle.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters