The length can be 18 and the width can be 2.
18 x 2 = 36
Or the length can be 12 and the width can be 3.
12 x 3 = 36
The length can also be 9 and the width can be 4.
9 x 4 = 36
An example for a y - intercept are....
( 0 , 7) ; ( 0 , 19) ; ( 0 ,15 )
y-intercept is where the x value is 0
It would be isosceles, since two of the sides are equal. if none of the sides were equal, it would be scalene, and if all of the sides were equal, it would be equilateral.