Get un-stumped in a hurry! Proofs made easierMake friends with lines and angles, theorems and postulates — and prove itThe proof is in the pudding — and the parallelogram, and sometimes the rhombus. With this friendly guide, you'll soon be devouring proofs with relish. You'll find out how a proof's chain of logic works and discover some basic secrets for getting past rough spots. Before you know it, you'll be proving triangles congruent, calculating circumference, using formulas, and serving up pi.Discover how to:Identify lines, angles, and planesCalculate the area of a triangleFigure the volume and surface area of a pyramidBisect angles and construct perpendicular linesWork with 3D shapes