Adding Angles of Measure
Aligned To Common Core Standard:
Grade 4 Geometry - 4.MD.7
How to Add Angles of Measure - Angles are sections of a whole circle, and the circle is divided into angles of different sizes. And if we combine all the angles together, it forms a complete circle and the total angle becomes 360o. Two overlapping angles can be added together to get a larger angle. Now, let us discuss how we can add angles in a step-by-step manner. - Let us consider a large pizza, where you are combining the slices together backwards, in order to complete its circle form. - We just have to add the pointy ends together and put the slices together. - Wider the pizza slice is, larger is its angle. - Now, let's take a look at the figure below. WAX + XAY + YAZ = WAZ 50° + 30° + 40° = 120°
Printable Worksheets And Lessons
- Finding Missing Angles
Step-by-Step Lesson- Use the sum of angles to find the missing
- Guided Lesson
- Please note that the letters are used to indicate the total angle
or sum of the 2 angles.
- Guided Lesson Explanation
- I treat this one very simplistically.
- Practice Worksheet
- Find an assortment of missing angles and angle sums.
- Matching Worksheet - Match the sum of the angles and the missing parts to their measures.
You have a whole bunch of partial angles that you need to use to find unknown angles with.
- Homework 1 - What is the value of x?
- Homework 2 - A little angle differences for you to determine.
- Homework 3 - If students can understand this diagram, they are way ahead at this point.
Previously, this skill was found up two grade levels on the National curriculum. Did students get smarter since I was in school?
Math Skill Quizzes
I could only fit four fully readable problems per quiz. Sorry about that.
- Quiz 1 - You will use mostly sums, but some differences are hanging around too.
- Quiz 2 - These are slightly larger angles for you to find.
- Quiz 3 - This really has a nice mix of problems to test your skills.