The focus question is: What is 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.
S - Sum of all angles S = 180 (n - 2) when n = any number of sides of a polygon
A - measure of one angle A = 180 (n - 2)/ n ORA = 180 - 360/n when n = any number of sides of a polygon
Focus Question: In a triangle, what measures of side length and angles give enough information to draw a figure? Notes from class- click here to access
These notes cover the Investigation Questions A and B from class.
Focus Questions: 1. How would you estimate the measure of an angle? 2. How do you measure an angle with an angle ruler or protractor? Today we looked at how to estimate angles using benchmark angles and also how to use a protractor and angle ruler to confirm an angle.
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)?