Focus Question: What are the size of each angle and the sum of all angles in a regular polygon with n sides?
The students will review what is important in a polygon and how regular and irregular polygons compare. The goal is for students to develop formulas the sum of interior angles for a polygon of n sides.
Focus Questions: When a drawing shows two rays with a common endpoint how many rotation angles are there? How would you estimate the measure of each angle? How do you measure and angle with an angle ruler and a protractor?
supplementary angle - angles that add up to 180˚
complementary angle- angles that add up to 90˚
Here are the notes from today's class and the 1.3 and 1.4 homework.
Focus Question: What properties do all polygons have?
Diving into polygons!
In the first section of Shapes and Designs, students spent time defining the characteristics of polygons. Ask your student, "What makes a shape a polygon?" These shapes have some specific properties!
Next, everyone got some hands-on time, looking at a variety of shapes and categorizing them. Most groups categorized the shapes by the number of sides they had, but then many expanded those further into sub-categories. How many different categories can there be for quadrilaterals (four-sided polygons)? Here is a picture of the students in action with the shape sets.