Summary of 9A´s class on Monday

Today we started our class by correcting the Worksheet about Inequalities for sides and Angles of a triangle, that was Due for Today. In the first four Questions we just needed to looking at a diagram and answer some question about the shortes and the longest segment. questinons 5,6 and 7 were also answering questions and listing the greatest to shortest. But in these last question we needed to show ALGEBRA. From now and on, in every question were you can use Algebra, we need to show our work. in quizes and tests, 25% of the question will be for the right answer, the rest 75% will be for showing algebra work.

After that, we took our notebooks and went to the math computer lab. We were doing an activity in geogebra. the Activity were conected to Theorem 5-12.

Theorem 5-12:the sum of the lengths of any two sides of a triangle is greater than the length of the third side.

This means: side+side>3rd side. See pict.

In the Activity there were Two circles and one Triangle. you were able to change the measurement of all of them.

Ms. Saatkamp asked us Three Questions that we needed to answer;

What happens if:

1) the measures of the two sides is Greater than the Third?

2) the measures of the two sides is Less than the Third?

3) the measure of the two sides is Equal to the Third side?

the answers were:

1) This is the only way you can have a triangle, the two circles overlaped each other.

2) in this way you can't form a Triangle, and now, the Circles don't even touch each other.

3) when they are Equal, you can't form a triangle, the two circles touch each other, but they don't ever lap, they just touch on one of the segments.

That was what we did in class.. and for tomorrow we have homework.

P. 270 # 14-30 even and 32-40 all.- it sounds much but they are really easy..

And don't forget, on friday, we need to have one Whole activity for the project done.

Good luck with all our Homeworks ans Projects.

See you tomorrow=)