Geometry is the mathematical study of shapes, figures, and positions in space.
It is useful in many careers such as architecture and carpentry. Harder - Geometry is the study of measurement and comparison of lines, angles, points, planes, and surfaces and of plane figures and solids composed of combinations of these. A shape is the outer form of an object or figure such as a circle, triangle, square, rectangle, parallelogram, trapezoid, rhombus, octagon, pentagon, and hexagon. There are equilateral, isosceles, and right triangles. A solid is a three-dimensional figure such as a cube, cylinder, cone, prism, or pyramid.