alr so what you have to do is find the intersection between the 2 vertices, which wil be (4,2) on desmos. Then, to find x and y interceps (and and b, respectivley), you us ethe formula x/a+y/b=1. You also know that 1/2ab (which will be the length of each side) is 25, so solve for ab, so ab=50. Then change a and b into x and y and plug in your intercept 4,2 into x and y to make 4/x+2/y=1. You will find 2 intersections. One is 5,10, but a has to be greater than b, so that cannot work. Hence, you have 20, 2.5 so the answer is 3/2. Lmk if you have any questions