This is the second half of the lesson on Solutions to Linear Equations. This contains more challenging linear equations, but the concept is the same--substitute and see if the left side is equal to the right side.
Trying something new, this is the first two pages of notes from our lesson on solutions to linear equations. This is about 15 minutes long...listen and pause when you need to.
This 'vocabulary' lesson introduced students to the different ways we say mathematical symbols. This is an introductory lesson for our fourth unit covering all types of linear equations.
In this lesson, we considered more complicated examples that involved finding missing angle measurements.
In this lesson, we put on our detective hats and found missing angle measurements knowing that all straight lines are 180 degrees, and that all triangles are 180 degrees. While it was challenging at first, by the end, I think students really got the hang of it.
This lesson proved that all triangles have 180 degrees by using what we just learned about angle measures of parallel lines, and knowing that all straight lines have 180 degrees. There were two 'formal proofs' of this presented, and students NEED to learn these proofs to be successful.
This lesson was very vocabulary rich, and we used what we already learned about rigid motions and congruence to prove that different types of angles have the same measurement. We are still reviewing elements of this lesson a week later as it was a difficult one for several students to grasp.