The basics of geometrylines, angles, planes, raysare a great beginning to this addition to the MATH SMARTS! series. Geometry, which means earth measure is used to measure anything on earth. No matter what size a rectangle iswhether it be a computer chip, an Olympic-sized swimming pool, or a city blockyou can always find its area by multiplying length by width. Readers also learn about polygons, triangles, circles, congruent figures, symmetry, and cones, as well as areas, perimeters, circumferences, volumes, and more!