How many angles does the triangle have?
Measure each of the angles by clicking on Click to measure angles and using the Gizmo protractors. (For help using the protractor, click on Gizmo Help, below the Gizmo.) Record your data. Click on Show angle measures and, with Interior angles selected, check your answers. • What is the sum of the angle measures of this triangle? Drag A, B, and C to make a variety of new triangles. Do the angle measures for all triangles add up to 180°? • On paper, make a table with three columns. Label the columns as shown below. Fill in the triangle information you found. At this point, your table should look like this: • Select Regular polygon. With Show angle measures and Interior angles selected, increase the Number of sides to 4. • A 4-sided polygon is called a quadrilateral. A polygon with all sides congruent and all angles congruent is called a regular polygon. What is another name for a regular quadrilateral? • What are the measures of the angles of a square? What is the sum of all four interio
