# Notes Copied from Google Classroom

We will return to rotation and dilation when classes resume hopefully sooner than later. The subject is harder to teach via this online method. I will introduce two new types of problems to solve that incorporate algebra and geometry this week. Much of what we are working on going forward, is a review for the final. Graduation is in 49 days. Your final and this is an approximation based on last years class is 40 days from today, classroom wise.
First we will review transversal’s. Remember all lines equal 180 degrees. If one part of the line is 50 degrees to find the missing degree, simply subtract 50 from 180, this gives you 130 the missing degree.
Many of the answers are repetitive regarding terms. The term congruent play a major role on page 348. We will review the different types of angles on page 349-352. These are topics we worked on last year as well as this year.
Pages 355 -356 ask you to find the missing angles. Add the given degrees and subtract from 180 degrees.
On pages 357-359 the use the same concept that everything equals 180 degrees however, they add a component of algebra to geometry. I will do the problem on page 357 Your term.
Add like terms (5y+3) + ( 4y+8) 5y+4y= 9y 3+8=11…. 5y+11=146, The 146 represents the extended line attached to the triangle.
Set up into an algebraic equations : 9y+11=146; subtract 11 from both sides : 9y=135;
Divide both sides by 9y. Y=15. Next, take the value of 15 and place it back into the original equations. 5(15)+3= 78 degrees. 4(15)+8=68. Your answers are 78 and 68 degrees.
If you any questions feel free to contact either the we posted last week or through Google Classroom. Take care!

Seventh Grade, we are going to skip some chapters, because they are more involved and really need to be taught in the class room. We will work this week on the area and circumference of a circle. Obviously, circles have no edges. They do however; have something called cords, part of the curved line of a circle that is illustrated by dots on the circle. To find the circumference multiply the diameter (The line that extends from one side of the circle to another), it is illustrated on page 265. The Radius is one half of the diameter! To find the circumference of a circle, multiply the diameter times Pi (3.14). If they give you the radius and ask you to find the circumference you need to double the radius and then multiply that times the radius.
If they are looking to find the area the formula is: radius squared times Pi. If they are looking for the area and the give you the diameter, do the following: take half of the diameter, square that number and then multiply times Pi.
If you need any help feel free to text the way you had last week or through Google classroom. If you want we may conduct a class at a certain time to help you do your work this week and going forward, please let me know.
Stay safe!