th shape is similiar to a triangle but the longer line is straight down and then two lines to the right side
Planar (two-dimensional) shapes are defined by the number of sides. A specific kind of shape called a polygon is a closed figure with straight line segments for sides. To answer your question, then, we would need to know whether it is a two-dimensional shape, such as a polygon, or a three-dimensional shape, which is called a solid for reasons that should make sense to anyone living in a world of three dimensions--it has width, length, and depth, just like anything that has any amount of volume. If it is two-dimensional and, as you say, is "similar" to a triangle, I have to assume that it is a three-sided closed figure with straight sides. In other words, it is a triangle. Otherwise, it's just three line segments on a page.