Wheels, clocks and coins. Balls and buttons. Circles are one of the basic geometric shapes and can be seen everywhere. In a book bursting with color and cheer, students can learn the fundamental properties of circles. Terms such as sector, chord and arc are clearly defined. Hands-on activities demonstrate how to find the radius, diameter and area of a circle. With this handy and lively guide kids can avoid spinning their wheels and get on the road to becoming geometry pros.