Ms. Bearse's Site

Today we talked about triangles, and about how to prove if a triangle is a right angle triangle or not.

We can use the pythagorean theorem also to calculate the length of a missing side of a right angle triangle.  The sum of the squares of the legs (perpendicular sides) of the triangle is equal to the square of the hypotenuse (the longest side).

Grade 9s learned a new song today to remember how to calculate the area of a trapezoid.  It’s to the tune of “Frère Jacques”
L’aire d’un trapèze, l’aire d’un trapèze

Base plus base, base plus base

Divisée par deux, divisée par deux

Fois hauteur, fois hauteur
We sang it loud and in a round.  We look forward to singing it with our math buddies in grade 7 in March.

We have a poster to help us remember out relaxation sequence.  

We also learned about the relationship between our thoughts, feelings and behaviours.

Emma Jane and Jackson are happy to help with any issues.  

We had a visitor today to talk with us about motivation, relaxation, and study tips.

We were happy to see Jackson today too.  He’s working though (see the vest?) so we can’t interact with him.

We are being forensic scientists today, and using math to solve a crime.  An ulna was found, and we are using a scatter plot of ulna length to height to predict the height of the victim.  We are also using our own data to create a scatter plot of foot length to height to determine an approximate height of a suspect based on the size of a footprint.

Period C: here is your data

Period D here is your data:

We were looking at how to prove a point (3,5) is the intersection of two given lines y=x+2 and y=-2x+11.

Some solved the system by substitution

Some substituted x and calculated y for each line

Some made tables of values for the lines and checked if (3,5) was on both lines

Some substituted x and y and verified that the two sides remained equal

Some solved by graphing
It’s pretty awesome to have so many ways to approach a question!  Many thanks to those who explained their work today.

Grade 10s, you are working hard to review all of the grade 9 course work.  Here are some resources for you to look at (en français of course)

Graphing lines

Translating words to algebra

We had a look at an interesting app/website that can help us with graphing scatter plots and also equations.  It’s free, and pretty easy to use.  Download it and give it a try!

We are stacking cheerios today!

We are comparing the stacking rates

And making graphs

Here are the worksheets we used: grade 9 and grade 10

After we determined who stacked cheerios the fastest and the slowest, we set up a head to head competition, and we levelled the playing field, giving the slower person a head start (we calculated how many cheerios they’d need to have as a head start–initial value).