How to get isosceles triangle in HFSS

hi,
i want to design micro strip antenna in HFSS. but im unable to get its exact shape...i have to cut 2 isosceles triangles at the corners of the rectangle antenna...plz suggest me hw to get dat triangle in HFSS.

Draw -> Line

Enter X = 0 , Y = 0 and Z = 0
Then X = 0 , Y = -2 and Z = 3
Then X = 0 , Y = 2 and Z = 3
Then X = 0 , Y = 0 and Z = 0

Now, right click and click done.