Wella has many sticks of length 6,7 and 12. She wants to form triangles whose sides consists of exactly one stick. How many non-congruent isosceles triangles can she form with the sticks? (Note: Isosceles Triangle is a triangle with at least two sides of equal length)

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.