Fortunately, when en doesn't mean on or in, you can usually tell by the context what is meant. Like some other prepositions, en can seem quite versatile to the foreigner. Here are the most common uses, with examples, of en you're likely to come across: Indicating location and meaning in: El dinero esta estÃ¡ en la. caja
A shape is an enclosed area. The boundary may be a line, or it may be implied by a change in color or texture. (Color has three aspects â value, hue and chroma; a change in any of these can create a shape boundary.) The area that comprises a shape can be defined by a line or a change in value, hue, chroma or texture.
Opposite of concave . A geometric shape is convex if all its edges point outwards. That is no part of it curves or faces inwards. If a shape is convex, a line segment drawn between any two points on the shape will always lie inside the shape. The figure above is a convex pentagon. No part of it is caved in and any line segment, such as the red one shown, linking two points on it always lies inside the shape. See also Concave definition.