caption: The image shows a black and white drawing of a triangle with a right angle and a left angle, along with some text written on it. The text appears to be a diagram of a convex prism, which is a type of prism that is composed of a series of curved lines that intersect at different angles. The lines are drawn in a symmetrical pattern, with the right angle of the prism at the center and the left angle at the edges. The background of the image is white, and the text is written in black.