You can
put this solution on YOUR website!For this you need the Pythagorean Theorum.

a = length (altitude) = b+50
b = width (base) = b
c - diagonal (hypotenuse) = 250

Foil the binomial

combine like terms

Square the Hypotenuse

Move all values to the left side

Divide all parts by 2

Factor

set each piece equal to 0

and

and

a Distance CAN NOT be a negative value.
Substitute
Dimentions:
Length = 200
Width = 150