Use a ruler, protractor and a pair of compasses to construct a triangle accurately. After the triangle has been constructed, leave the construction lines visible so each stage of the process is shown ...

To continue reading this content, please enable JavaScript in your browser settings and refresh this page. Preview this article 1 min What could become the world's ...

Choose a polygon, and reshape it by dragging the vertices to new locations. As the figure changes shape, the angle measures will automatically update. Animation: For triangles and quadrilaterals, you ...

During the government shutdown, Smithsonian Associates sponsored online programs and in-person study tours are continuing as scheduled unless otherwise noted. Check with Smithsonian Associates for ...

It is commonly believed that geometry began as a practical subject, and came into being as a result of everyday concerns. The earliest practitioners of geometry developed a set of rules to calculate ...

Founded in 1920, the National Council of Teachers of Mathematics (NCTM) is the world's largest mathematics education organization throughout the United States and Canada.

Hosts Sara Gallegos and Angela Huffman work with guests to explore quilting ideas, both old and new. Whether a beginner or an expert, quilters of all levels learn from the tips, techniques, and ...