"Triangles are terrific! We need this shape. Our favorite chips may be triangles. Mathematicians use triangular rulers, and triangles feature prominently in many flags as well. This book will guide... This description may be from another edition of this product.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.