Skills Review #-1-4 Worksheet

Here are the answers to the Skills Review #1-4 Sheet.

Click here to access.

Please check-in where you stand and get assistance with some of the areas you are having trouble with.

Tessellation Activity Link

Investigation 2.3 - Tessellation Link- 

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Extra Help Worksheets and Site.

Link to Geometry and Regular Polygon Site

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Investigation 2.1 Notes

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

Investigation 1.5 - Drawing with a Ruler and Protractor

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.

Investigation 1.4 Notes and Vocabulary

Investigation 1.4

Important vocabulary:

• 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.

Click here to access the notes.

Here is a sheet to help with benchmark angles.  This was given as a hard copy to all the students.

Click here to access the worksheet.

Investigation 1.3 and 1.4 - Estimating and Measuring Angles.

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.  

Here are some notes from today's Investigation 1.3
Click here to access

Online Help Videos:
Khan Academy - Using a Protractor

LearnZillion - Estimating Angles with Benchmark Angles


We also discussed questions students had on Skill Sheet #2.
Here are the notes from the front.
Here are the notes from the back of the sheet.

Investigation 1 - Estimating Angles - Fun Online Resources

Online Resources:

Enrich-Math - Estimating Angles

Alien Angles- Estimating Angles

Banana Hunt - Oswego.edu

Investigation 1.2 - Angles and Rotation

Focus Question: What are some common benchmark angles? 

Today students looked at the question, "What are some of the benchmark angles?"

Students were exposed to vocabulary words such as:

• acute
• obtuse
• initial side
• terminal side
• degrees
• right angle 
• straight angle

Here are some of the notes taken from today class.

We ended by playing a connect four game.  Lets see if our students can defeat their parents!

Investigation 1.1 - Sorting Polygons

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 are some notes taken from Investigation 1.1.

Math Skill Concepts

Skill Sheet #1 was handed out today.  This will be due by Friday, September 5th.
Click here to access Skills Page #1

You can find help on the following site for our skill problems.
Click here to Access Math Skills Help Videos

Click on the specific "Skills Topic" on the right hand side of the site to see the content specific video.

At the start of class each Wednesday we have time designated for Skills Questions.

Good luck!!